Experimenting with .22 LR as substitute for 5.56mm
Experimenting with .22 LR as substitute for 5.56mm
This guest post and accompanying photographs are contributed by a guest writer, Alton Chiu. Alton currently writes for Small Arms Review. This is his second article contribution to TFB and is on the merits of using .22 LR ammunition for training.
.22 LR is known for cheap plinking fun and is also commonly associated with junior shooters. Even for new adult shooters, the author has observed a desire to transition into “real” calibres as soon as possible from both the coach and trainee. This article explores how a 22LR rifle can be an effective training tool for a seasoned rifleman because it is comparatively inexpensive and is less environmentally constrained.
Just like how a professional musician routinely practices scales and etudes to hone the basics, a seasoned rifleman should routinely practice the high power rifle discipline. Appleseed (RWVA) introduces many to the marksmanship basics, and the organization favours the 22LR rifle for its low cost and recoil. At 25yds, any deviation can be attributed to the rifleman rather than equipment; this facilitates diagnostics by removing “golf excuses”. 22LR also allows volume practice at a reasonable cost. Factory match grade 5.56x45mm and 7.62x51mm cost about $1 per round. While hand-loading can bring the 5.56x45mm cost to about $0.35 (excluding the case), a high quality 22LR such as SK and Eley is about $0.12 without the labour of reloading.
Wind reading is another critical marksmanship skill that should be habitually honed. Ironically, the money and technology that allow a round to better buck the wind is undesirable for training because a long distance range is required to fully appreciate the wind effects. This is a luxury not always afforded by geography. The 22LR shines as a windage training tool because its slow velocity and low ballistic coefficient allow it to approximate a centerfire cartridge at much closer angular hold off in a 10mph wind.
22LR Subsonic 40gr 100m 150m 200m
6.5 Creedmoor 140gr 300m 420m 580m
This accessibility in range space and cost can help proliferate PRS-style 22LR club matches where positional skills can be improved alongside marksmanship fundamentals. The barrier to entry for the club is lower than a PRS match because the space needed is much smaller, and the steel targets are cheaper due to thinner gauge and smaller size. The barrier to entry for the shooter is also lower due to reduced equipment and ammunition costs. The cost to try a match is nearly free because most shooters already have a 22LR rifle and are also likely to have a spare “el-cheapo” scope. In addition, the inconsistencies of bulk 22LR ammunition would not impact enjoyment if the match is held inside of 100m. Even a “no expense spared” 22LR rifle is notably cheaper than that of a centerfire PRS rifle. The low barrier-to- entry of a 22LR match helps to draw in new shooters, and for clubs to host the match.
The author chose to assemble a 22LR AR upper as a companion to his 18” AR-15. The same Seekins 12” SP3R V3 handguard and matching upper were used to maintain consistent handling. The 22LR upper featured a Nightforce SHV 4-14×50 F1 which shared the same MIL-R reticle with the NXS 2.5-10×32 of the 5.56 upper. The parallax adjustment of the SHV was a necessity for the reduced distances of 22LR. The Bobro 20MOA QD scope mount was used so that the author may substitute a red dot sight for practicing “run-n- gun” drills. The Beyer 16” barrel gave excellent accuracy, and a CMMG bolt rounded out the internals. The lower receiver and its Geissele National Match trigger were shared between calibres. The author opted for a Boonie Packer Better-Mag adaptor to retain bolt hold open function in the 22LR upper. A 10 round magazine was used for easier handling in unconventional shooting positions. The author noticed that bulk 22LR ammunition produced good groups at 50m, with fliers appearing by 100m. When shooting to 130m, the author noticed that SK Standard Plus (40gr subsonic) had much more consistent performance than the CCI Mini Mag (40gr supersonic). The author believed this was partly because of the super-to- subsonic transition and associated buffeting. However, the bullet drop of the subsonic ammunition (5.0mil) is significantly more than that of the supersonic ammunition (3.7mil).
This article laid out the cost efficiency and easy accessibility of a 22LR as a marksmanship practice tool, worthy of a home with seasoned rifleman and novices alike. If this piece had piqued the readers’ interests, the author encourages them to attend the next 22LR match at their local club, or even start a club match.
Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.
Please feel free to get in touch with me about something I can add to a post, an error I’ve made, or if you just want to talk guns. I can be reached at firstname.lastname@example.org
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June 16, 2017 at 05:00AM