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25 wssm coyote

25WSSM (Winchester super short magnum)

 

The series of Winchester super short magnum cartridges never really started any fires with the interest of shooters. You can read many threads of why these (223wssm, 243wssm, 25wssm) rounds are undesirable, along with reloading issues and touchy pressure spikes.

I found a very lightly used Winchester model 70 Coyote, chambered in 25wssm. These rifles have a nice look with the laminated stock, matte finished receiver and stainless barrel, this one saw very little use with aprox. 80 rounds down the bore. The previous owner claimed ¾” groups with handloads using 100grain bullets at 100yards are the best this rifle will print and doubted tighter groups could be produced. The price was right the rifle looked good so off to the bench for a really good barrel cleaning was first up on the list, those were some beep blue colored patches that kept getting pushed out of that 24” varmint taper barrel ( I’ll cover some bore cleaning methods in a later writing ). Disassembly revealed good stock bedding, free floated barrel and solid scope mounts with Burris rings.

The factory twist barrel was 1-10 allowing a good selection of bullets so I picked the 120grain Winchester “pep” ammo at 3000fps to check for accuracy. This would be a very good choice for those Michigan deer this fall, I did one small adjustment to the factory trigger after installing a lighter weight sear spring and was able to tune a nice clean breaking 1.5LB trigger pull. The morning was a mild spring day and I settled the 25wssm in the sand bags then adjusting a Weaver Grand slam 6-20×40 scope on the 100 yard target I fired the first three rounds to produce an unimpressive +1” group, which should tighten up once this very clean bore fouls a bit. Taking time between shots with a larger bore diameter helps evaluate groups better while controlling barrel over heating. The next three rounds printed a very nice ½” group that will work well for larger game, and already this average shooting rifle was showing some accuracy potential!

With a proper barrel cleaning, trigger tuning and good shooting technique box stock (kinda) rifles can produce very good accuracy. Now we will go after some really fast velocity along with good accuracy for the varmint loads, these will be handloads directed at squeezing out the best performance using a 75grain Hornady A-max bullet that will be focused at reaching 3600fps.

Stay tuned in for range results on the 75grain varmint loads……….I was surprised at the powder of choice I ended up with.

 

 

Testing 75grain varmint loads, a surprising powder came out the winner

25wssm

25wssm

25wssm

25wssm

This is the factory  load that proved it was a shooter!

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Project 6mm-284 winchester

7-30 004

 

ALL LOAD INFORMATION CONTAINED IN THIS ARTICLE PRODUCED SAFE PRESSURE IN THIS RIFLE. REDUCE LOADS BEFORE TRYING TO DUPLICATE MY RESULTS.

Project 6mm-284

From Vais to Arch to 6-284 some things never change.

 

“Whatever cartridge design that is necked up or down, blown out or shortened has already been experimented with”

 

This is a phrase I read years ago and it has stuck with me like copper jackets on bullets, as I recall in a recent VHA issue #71 an article on a 22-6.8, later to be compared to the 1940’s era Lindahl Chucker cartridge. Its funny how things are forgotten then rediscovered as with my latest cartridge notion which brought me thru a full circle process when wanting to wildcat my favorite 6.5×55 A.I. case. In a previous article I wrote for VHA issue # 68, a 6.5×55 A.I. chambering was chosen; while reloading the 6.5×55 A.I. brass I wondered what performance I could obtain from necking it down to a smaller caliber. After consulting friends about the wildcat chambering I came across “The Vais” rounds based on the 6.5×55 Swede cartridge.

 

George Vais improved the brass then necked them down to .224” and .243”. The Vais loads used a heaver bullet than I intend on using however the velocities looked very good with published data. Along with several short articles and ballistic data found on-line all my questions about necking down this case were answered. A 6mm (.243”) bore diameter was picked for this build to fill the gap between my 22 caliber and 6.5 caliber varmint rigs. I really liked the idea of the 6mm Vais cartridge it looked to be a very promising one with good velocities along with a vast choice of 6mm bullets. After researching custom reamers and reloading dies along with head space gauges the costs were reaching far more than I wanted to spend on this venture.

 

While re-reading the Vais articles I noticed a small reference in one section making the comment about a “ballistic twin”; this small statement opened the door to huge cost savings to my now revived project! The 6mm Vais ballistic twin is the 6mm-284! Again more research started and while pouring thru P.O. Ackleys handbook for shooters and reloaders  the 6mm Arch cartridge was found. Developed by Dr E.L. Arch the 6mm Arch is a 6.5×55 Improved case pushing 60 grain pills at velocities of 4200fps!!  Ok now I’m hooked and orders were placed for components to build a 1-12 twist 6mm-284 varmint rig. The action to be used if you haven’t already guessed by my other articles printed in this magazine (issue #60 & #68) will be yes once again a Mauser M98, now with consideration to chamber pressure the soft receiver core along with a case hardened surface, the Mauser action will hold up for many years of faithful service. P.O. Ackley’s volume II handbook lists several blown up actions along with pressure comments on several military conversions, the actions are nicely machineable and provide an excellent platform for accurate varmint builds. Bolt lock time can be improved by 40% (I’ll cover this later) and quite a few gunsmith/hobbyist/shooters have cut there teeth on customizing Mausers. Parts are abundant and many enjoyable hours can be spent machining parts for custom applications; bolt shrouds, bolt stops, receiver charger humps, rear tang, bottom metal…..it’s endless!

 

When built with correctly fit components the finished rig can easily shoot in the .2’s at 100 yard ranges, I know this because I have built and shot several sub-moa Mausers. First up the bolt needs a low handle so I shipped a Ruger M77 style handle and the Mauser bolt body to “the bolt man” James Robert from Paxton, MA, he will do a fantastic tig weld job at very reasonable prices along with bead blasting if requested. I decided to have the bolt handle polished bright while the bolt body would be bead blasted. During the time it took to have the bolt work completed I modified the bolt shroud to function with a side safety, I  will say building the fixture to machine the shroud was just as fun as milling the shroud itself!  The finish on the shroud and extractor were blued and the cocking piece was polished bright. Now focusing on lock time of the firing pin will need to be addressed and a Blizchreen 24lb firing pin spring from Brownells was ordered, I have noticed when using a Buehler wing type safety along with a 24lb firing pin spring the safety will be heavier to operate. The side safety will only need a moderate touch to function with the new spring installed and this will produce an improved lock time which is adequate for what is needed. With the bolt finished I completed typical action work; lap lugs, polish rails, chase receiver threads, square bolt face, and as usual contoured the metal to have a sporter look. A call to Boyds resulted in a nice pepper laminate varmint stock that was shipped right away, after pillars; action bedding then free floating the barrel this would serve the purpose of a load development platform. After all the heavy laminated Thumbhole bench rest stock would not arrive until quite some time later and I just had to see how this rig would perform!

 

I had earlier placed an order with E.R. Shaw barrels for a short chambered, 1.250” diameter straight no taper stainless steel 26”, 1-12 twist heavy varmint barrel.  I could now turn my focus on finish chambering this fine tube, headspace gauges and finish chamber reamer came from PTG and are excellent quality tooling. There is a special joy in finish chambering a custom built rifle and with only .009” (aprox. 3 sheets of standard paper) between the go gauge and the field gauge a light touch is all that would be needed to obtain a nice snug varmint/target chambering. I have always liked light pull weight triggers and thought I would try a Jard 8oz trigger; the fit was great along with smooth function, creep, over travel and sear engagement are adjustable. Looking thru the scopes I had on hand I decided on a Tasco World Class 24×44 target model, this will allow for some fine placement of the 1/8” target dot on the reticule.

 

I have spent countless hours on-line gathering data on 6mm-284 loads and then crunching the numbers with a Quick Load program ( VHA issue #70 has an excellent article on the use of this very effective program). The more I read gave fuel to the excitement of this cartridge! Keeping in mind as with any overbore chambering hot loads equal short barrel life. So even thou I plan to touch the outer fringes of that wonderful +4000fps I will slow things down to preserve the barrel some. RL22, RL17, IMR4350 and IMR4831 seemed to be the powders of choice for this 6mm along with 66grain custom H.P. jacketed bullets made by a fellow VHA member Dominick Gagliostro. Winchester cases already necked down to 6mm were purchased, full length resized and trimmed to 2.165” along with flash holes deburred.

 

 

The first trip out to the range was a nice mild 60 degree day with a slight breeze. I decided on RL17 & RL22 as starter powders and used mag primers from the start. With case length trimmed to 2.165”, necks turned to .014” thick an overall cartridge length measured at 2.800” to the tip of the 66grain match bullets. I was pleased to see three shot groups of ½” at a velocity of 3514fps while using 52grains of RL17, now for the surprise while grouping the RL22 loads of 53 and 54 grains both printed the first two shots in the same hole with the third opening the groups to just under ½” with a velocity of 3300fps. As I have read the secret to bringing this cartridge to life is with the use of slow burning powders, first round loads didn’t show any high pressure signs bolt lift was easy and 4000fps might be seen in the next load batch. (accuracy will trump velocity for me)

Very mild recoil and ease of load development is a wonderful thing to experience during beginning load development! The first twenty rounds gently seasoned the bore along with proper barrel cleaning and I am excited to load up the second batch of rounds to further check for accuracy and pressure. Time at the bench assembled another twenty test loads then off to the range. Temperature was at 57 degrees  with a slight breeze again, first up would be the RL22 batch with 55grain loads producing .243” groups @ 100yards with 3444fps. With the 24x tasco holes on the target could easily be seen and what a delight to look at one ragged hole! RL22 would not be the powder to produce velocities close to 4000fps as 58grains opened the group up to ¾” @ 3778fps.

 

RL17 turned out to be the velocity king with this barrel combination. As I slowly touched off the 8oz trigger mellow recoil allowed me to quickly re-sight the X-ring and after three rounds punched thru the paper I was glad to see that 54grains under the excellent 66grain match bullets printed a very nice .164” group @ 3844fps. Now seeking the 4000fps mark I went one grain hotter and found 55grains opened the group to .306” @3920fps, as the groups seemed to spread out with more RL17 an odd thing of slightly easier bolt lift was noted. When cleaning the barrel later that evening no copper fouling was found and the carbon quickly brushed out to leave a bright shinny bore that will be coated with (lock-ease) liquid graphite. Another test batch of RL17 & RL22 rounds were loaded up to check consistency, 54grains and 55graind respectively.  Bullet seating depth would be adjusted to find the sweet spot for both loads. As you can see by the load data chart both loads proved to be accurate and consistent, I will use RL22 for target shooting to save the throat while shooting RL17 for live varmint control. After load development was finished the Boyd’s stock was sold and the Richards micro-fit bench rest stock was shaped, bedded and pillared. Ordered as a blind bottom stock I made up new action screws and custom length pillars along with a cut down magazine box that I bedded in the stock to provide an extra locking point for the action when tightened down for accuracy.

 

 

I thought this would be a good time to check out a new optic line (new to me) so a Leatherwood/Hi-Lux 7-30×50 Uni-Dial scope was ordered. I have had a lot of conversations with Corbett Leatherwood regarding his optic line since there is a lack of reviews available on line, posted in the Varmint Hunter Magazine optic forum I started to test these scopes out and have posted results for members. As a little known company there quality recently has reached excellent levels for clarity, crisp image, durability and after talking with Mike Sexton at Iron Sight he ranks then as good as Leopold’s!

Features I like are the programmable elevation flags that will lock in any desired zero for 10 different ranges. The windage  turrent  has a zero set that will allow windage adjustments to be made without any chance of losing your original zero, then there is the unique feature of the objective focus adjustment knob that is located at a 45^ angle in front of the turrent housing! Unique to Leatherwood/Hi-Lux and very easy to operate. At the range I found tracking to be right on while shooting the “box” test and no point of impact shift was noticed as I ran thru the power settings while keeping a reference zero. This is a Second focal plane construction with a fast focus eye bell and a 50mm objective, another handy feature is the No-Math Mil dot reticle. With a quick frame of the target then look at the power ring (which will also indicate range) turn to elevation to the correct flag and dust that critter! A sunshade and flip up end caps are included along with a lifetime manufacture warranty this turns out to be a very nice optic.

 

 

Looking back at this build has shown me the potential of the 284 Winchester case. I am pleased with the accuracy and looks of the now completed rifle (as pictured with a 7-30×50 Leatherwood and Richards stock) in 6mm-284. I would like to think I have a complete collection of rifles chambered for my needs, however that all changed when my 22-284 Winchester barrel arrived a few days ago……I’m kinda liking these overbores!

 

 

6mm-284
winchester 284 cases, necked down to .243 and turned to .014″
flash hole debured,annealed necks/shoulder
CCI magnum primers
trim to 2.165″
C.O.L. 2.800″
bullets- custom 6mm, 66grain match j4 jacket
RL17
49grns 3346fps primers backed out slightly (to light load)
51grns chryno error clean necks, easy bolt lift (.50″ group)
52grns 3514fps clean necks, easy bolt lift (.50″ group)
RL22
52grns 3055fps dirty necks, easy bolt lift
53grns 3136fps dirty necks, easy bolt lift   (see note)
54grns 3300fps clean necks, easy bolt lift   (see note)
note: first two shots in same hole with third opening group to +3/8″
ALL ABOVE LOADS WERE SHOT DURING BARREL BREAK IN
chrony placed 10′ in front of muzzle, 60 degree F, slight cross berrze, 100yards

!���s7-30 0076mm284 4shot

Groups during load development

Groups during load development

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Leatherwood Hi-Lux Uni-Dial optics test/Review

So I went and bought a Uni-Dial 4-16X50, I couldn’t resist the temptation to see for myself what these scopes were like. For starters the 30mm tube and top angle focus make for a beefy looking optic; the reticule is nice with several elevation and windage reference points. As for clarity it is very good edge to edge and with a Second Focal Plane reticule P.O.I. did not shift to any noticeable degree for a hunting optic. I shot at 4X, 8X, 12X, 16X referencing same P.O.A. with rapid shots, all inside a dime at 100yards. Now the resettable elevation zero works great along with the zero set for windage, I shot the “box” and tracking was good with the last shot printing right next to the first shot (my error and a warm barrel threw the last shot).

This is not a Bench Rest optic and once zeroed and flags are set for desired yardage it works excellent! I have not experienced any problems with a loss of zero and for field use it runs out great. Do some reading on SFP reticules and adjusting for clarity and you will love the No Math Mil – Dot system.

 

Business end of the        4-16x50 Uni-Dial

Business end of the 4-16×50 Uni-Dial

Uni-Dial 4-16x50

Uni-Dial 4-16×50

Mauser M98 chambered in 22-250 Rem.

Mauser M98 chambered in 22-250 Rem.

100 yard zero shift test target

100 yard zero shift test target

 

I have read other reviews on Leatherwood/Hi-Lux optics and usually the china made fact turns most people away. I first started to try the Leatherwood/Hi-Lux scopes with the CMR 1-4×24 fitted to a M4 platform and performance was Excellent! (Shot Gun News, David Fortier,10, November, 2010). My next purchase was a Uni-Dial 4-16×50 with the 45^ angle Top Focus and Second focal plane this glass was mounted on top of an accurate 22-250 varmint rig. Again I was impressed with tracking, zero hold, clarity and excellent focusing. While looking thru an issue of Shot Gun News (10, March, 2011) again David Fortier runs a piece on a Leatherwood/Hi-Lux 2-7x32mm LER scout scope, he mentions talking to Hi-Luxs president John Wu at Shot Show and was informed of his (Mr. Wu) desire to produce high quality optics. There are several other aspects mentioned of technical improvements along with European optic technology being used in the Leatherwood/Hi-Lux optics.

 

I am likely to buy a 7-30×50 Uni-Dial scope to complement my 6mm-284 and run it thru some drills. I think this brand of optic will become better known since they are seeing more print in shooting magazines and they are worth putting an eye to one and printing some groups to prove their worth. I wouldn’t criticize these scopes until you have used them in the field as I have and find they are well worth the money.

 

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22-284 Winchester cartridge development

100_3039

 

“The next trip out to the range was sunny and a balmy 45 degrees, pet load of H1000 @ 53grains and this time 230yard groups printed ½” for 3 shots! Yes I was really happy! ”

**ALL LOADS USED IN THE TEST RIFLE MENTIONED SHOULD NOT BE DUPLICATED IN ANOTHER FIREARM UNTIL SAFE WORKING PRESSURE IS CONFIRMED**

 

 

 

 

 

 

 

22-284 Winchester,  Life at 40X

 

After a recent varmint rifle build using the 284 Winchester case (TVHA issue 84) I made a mention that a barrel was on order for a 22-284 Winchester chambering.  This article will focus on the cartridge and load development along with a field test on the Barska Benchmark 40X scope.

Many hours have been spent reading thru older publications regarding the 22-284 and searching web forums for load information.  There is not a lot of info on this cartridge as most shooters just write it off as an extreme overbore with diminished returns on powder burnt, along with short barrel life. To my delight I found an old forum thread that mentioned a 22-284 project back in the 60’s, once I gathered some bits and pieces on the article I found that it was a “Guns & Ammo magazine” August 1964 issue titled “ 6000fps world’s hottest .22!  by Bob Hutton “.  I did a search on e-bay for the old Guns & Ammo 1964 issue and for $7.00 shipped it now resides in my reloading library.  Reading the article makes one envious of the developers of that era, as mentioned in the article regarding velocities of 6585fps and showing some cartridge high pressure signs. Then slowing things down a bit to 220 swift pressures clocking in at 6300fps!  All while keeping good 300 yard accuracy. Since 1963 when this .284 cartridge was introduced wildcatters have necked it from 6mm to .35 caliber with good results. I have kept a file with several pages of various loads used by past developers and decided to start with H1000 and Reloader 22.  With a 1-9 twist in this barrel I started out with 75 grain A-Max bullets loaded with a seating depth of one bullet diameter (.224”).  A dummy cartridge was seated with a 75grain A-max and checked for proper chambering, extraction and ejection. All went very well and I must say that is one impressive looking hot rod cartridge! I even think the crows outside kept quiet while I admired the round by the window thinking about down range performance.

 

Starting with a new barrel ordered from M&L Enterprise in Oregon, short chambered in 22-284 Winchester, varmint tapper, stainless steel, finished at 27” long.   The crown was cut to an 11 degree target contour then a PTG reamer and gauges finished the headspaceing to the action. With this miniscule .224 bullet being pushed with a very large amount of powder I chose to have the barrel cryogenically frozen (300 Below, inc) to help slow the unavoidable throat erosion.  Since this was a new barrel any accuracy improvement due to the cryo treatment cannot be confirmed however talking to several shooters boosted my confidence in the benefits of the process, so off it went to the deep freeze! With new 284 Winchester brass I start with a RCBS group G shell holder # 03, a form die that will size the case to a 6.5mm neck ( RCBS # 58119   ), as I found with my 6mm-284 project after necking down to 6mm the necks will need to be turned to a .014” thickness for best performance. Now with 60 cases formed to 6.5mm-284 it only takes a run thru a 6mm-284 full length die then a 22-284 full length die       ( RCBS # 56052 ) to finish up the forming.  Imperial sizing die wax was used during every step of the forming to avoid any crushed shoulders or necks, then primer flash holes are cleaned up, cases are trimmed to a uniform length of 2.1700” and finally necks/shoulder are annealed to eliminate any brass hardening from the forming process while necking down .284 to .224”.  Since I had such great results with Federal 215 Magnum primers to ignite the large quantity of powder in the 6mm-284 load during the development stage of the previous build. I decided to stay with them while load testing the 22-284.

 Note;  The mag primer tip was found right here on the VHA forum during a discussion with “300win”

 

 

Range time; with three different powder load charges of each H1000 and RL22 the first 50 yard zero checking rounds printed a nice tight ¼” 3 shot group with the fourth shop opening it up to ½”. That was with a new bore and H1000 @ 53 grains clocking in at 3468 fps. That’s good speed with acceptable 50 yard accuracy, now to do some 100 yard load development!

H1000 was tested first with 53, 54 and 55grains, again the 53grain load printed a ¼” 3 shot group with 54 & 55grains around the ½” mark and a top speed of 3579fps @ 55grains with a slight stiff bolt lift.  Now for the RL22 loads of 48, 49 and 50grains, consistent two shot one hole groups with one shot opening the group to ½”.  Speeds with RL22 ran close to 200fps slower than the H1000 loads, top speed with RL22 @ 50grains clocked in at 3331fps. Later that day studying the targets a pattern was easy to spot.  Since this was a new barrel I was cleaning the fouling and copper out after each shot, two in one hole with a flyer again and again! The flyer was the fouler shot, it had to be.  I was firmly rested in sand bags just touching off the 6oz Jard trigger and the 36X scope was equipped with a “Tucker” style reticule lock.  Wanting the speed for good varmint work I stayed with the H1000 and returned to the range to further test the 53grain load. I also had a 55.5grain load to check for more possibilities.  I was now cleaning the barrel after 3 shot strings and using some liquid graphite Lock-eez to coat the barrel with; ¼” groups became the norm with 53grains of H1000 and the 55.5grain load needed to be checked for its secrets.  Remember what you read I told myself after touching off one round and then needing to really pry hard on the bolt handle to extract the round!  You know the drill thumb on scope tube, index finger wrapped around the bolt knob and grit your teeth…  I only recorded one round of 55.5grains @ 3634fps and proceeded to tear down the other two rounds and then measure the overpressure spent case.  With the shoulder push forward 0.100” I could not get the case to resize down with a F.L. die, that load will go in the load book as MAX pressure!  I plan to keep shooting the 75grain A-max loads until groups open to .75” consistently, a quick look at ballistic charts shows just less than 1000Lbs of retained energy can be expected with the H1000 load out to 400yards! That should hit like the hammer of Thor on varmints. Then I will start running lighter 50grain and 45grain pills down the bore to have fun with pushing high 4100+ fps velocities after all isn’t that the fun of experimenting with an overbore.

 

I was satisfied with the 100yard testing and started to set up at 200yards.  Even with the cartridges’ 35 degree shoulder tapper I needed to trim the case length and anneal the neck/shoulder area after 3 firings of a case.  Switching to the Barska Benchmark 40X scope allowed me to really see those tiny pin holes at 200yards, vertical stringing of shots seemed hard to avoid and my best 200yard group was a disappointing ½ m.o.a.   The temperature was mid to high 30 degrees, I was getting tired of a knee deep walk in the snow to retrieve my targets so I packed up the Dodge 4×4 and let the 5.7 Hemi do the work.

Later that evening while reading thru publications, keeping good records of interesting topics really helps out when working thru accuracy issues.  An article in the December 2012 American Gunsmith written by Norman E. Johnson titled “counterbalancing the stock” was just the cure!  All that was needed to eliminate vertical shot displacement was to add butt stock weight to help offset the 27” barrel and make the rifle track better in the bags, ½ pound of steel shot was poured into two 9/16” holes drilled into the upper section of the stock nicely hidden under the morgan adjustable butt pad.  The next trip out to the range was sunny and a balmy 45 degrees, pet load of H1000 @ 53grains and this time 230yard groups printed ½” for 3 shots! Yes I was really happy!

There are particular accuracy issues that plague an overbore .224 barrel,  the one I experienced was a need to clean out the copper fouling after only 9 rounds fired and are those patches BLUE!  I found the cleaning to go fairly quick thinking it might be a combination of barrel quality, cryo freezing process and the use of liquid graphite to coat the bore. The 22-284 proved to be an accurate cartridge right from the start with little fuss in finding a good load. Low recoil however with a very loud report upon firing, I will need to see how long cases last for reloading and I hope to get 1000 rounds down the bore before noticeable accuracy is lost with erosion.  Running a Quick Load program on the 22-284 for ballistic drop estimates have shown a 12” drop out to 400 yards (with a 230yard zero). I have included the actual drop elevations I recorded during range time with this barrel; your individual results may vary however this will be quite handy in getting you close to hits at different ranges.  With any custom cartridge the work and time spent is well worth the effort if desired results are achieved, I plan to be shooting plenty of pesky varmints with this Big .22 for some time now.

 

Thoughts on the Barska Benchmark 40X;

Initial load development with a 36X scope modified with a tucker style reticule lock proved the pet load to be accurate. Switching to the big 40X Barska at longer ranges will be a good test on the quality of their fixed power Benchmark line.  Built with a 30mm main tube, 50mm objective, click adjustable target turrents and side parallax adjustment this is one big scope.  I found the sight picture to be crisp and clear with bright edge to edge image. The mil-dot cross hair are a bit heavy for me but they do show up good and don’t wash out when scanning the woods for vermin, click adjustments tracked very good and the parallax adjustment worked very good althou you need to turn the dial very slowly to fine tune the sight picture.  The biggest gripe I have is the lack of horizontal hash marks on the turrent post, once zeroed and knobs reset you better keep track if you turn a complete revolution. Out to 300yards I could easily see the one inch grid marks on the target with a clear picture in 14 degree F conditions.

 

 

            22-284 Winchester
75grain A-max / 53grains H1000
B.C. .435 / velocity 3488 / Altitude 662′
Range Energy path
100yrd 1751 lbs 1.34″
200yrd 1504 lbs .87″
230yrds 1460 lbs zero
250yrds 1391 lbs (-).78″
300yrds 1285 lbs (-)3.46″
400yrds 1091 lbs (-)12.3″
42 F /  pressure 29.44 in. of mercury

 

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Ballistic turent tape

I found this ballistic turent tape while reading a post on http://www.longrangehunting.com,  most scopes do not have a zero stop feature and very few have programmable elevation turents. I installed this tape system on two of my long range varmint/target rifles and found them to be very effective for quick elevation adjustments all while not losing any of the multiple zeros at different ranges.

 

http://customturretsystems.com/

 

I added a unique feature to my custom label. A simple Asterisk at the point blank range indicates where to dial to for consistent hits on game with a pre-determined impact zone out to the max effective range. (more on point blank range later)

 

http://www.longrangehunting.com/articles/custom-turret-systems-review-1.php

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Barometric Pressure Sweet Spot

Ever notice when you have that accurate load developed how well it grouped with the barometric pressure that day.  I write down all the specifics of not only the load data but the B.P. also, granted the load will group good on other days however for this 6.5×55 Ackley Improved round when I see a B.P. of 2944 I’m headed out for some  tight groups and excellent velocities too!

 

6.5×55 A.I.  IMR 4831 powder and a 123 grain Match King,  4 rounds @ 100 yards.

6.5x55 Ackley Improved

6.5×55 Ackley Improved

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