.22 Mag Semi-Auto's
- Thread starter Mr. Friendly
- Start date
Skeletor68
Regular
- Location
- Wainwright
The STG-44, in .22cal.
Nope. BC make 25rd mags for the A17 that will fit the A22 but do not function with 22wmr. Has been extensively tested by guys stateside with no success. One suggested going at it with a dremel (YMMV).
Moe
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well, I still want a PMR30.
If you want to shoot one first, let me know. PM me and we can meet up at Abby or Mission. That was my first restricted purchase and bought around the time I joined CGN. Hence the handle.
The general consensus on .22 WMR accuracy is that it is decidedly inferior to that of either the .22LR (with good ammo) or the .17 HMR, even in top-of-the-line bolt-action rifles. This has been my own experience with a couple of Anschutz 1720s, the best .22 WMR that Anschutz made. So, we might expect really poor accuracy from a semi-auto .22 WMR.
However...there is this really-solid accuracy report from a year and half ago by the NRA staff, writing in the American Rifleman, on the Magnum Research MLR .22 WMR Barracuda:
https://www.americanrifleman.org/articles/2015/12/3/magnum-research-mlr-22-wmr-barracuda/
These results border on astounding to me and can't be written off as a fluke. The authors shot 5 consecutive 5-shot groups at 100 yards with three different ammunition lines. Their average group size over all 15 consecutive 5-shot groups of .91" is simply amazing--better than almost anyone has obtained with this cartridge even with top bolt guns.
So, if I were interested in purchasing a .22 WMR semi-auto (which I'm not), I think that this would be my choice.
However...there is this really-solid accuracy report from a year and half ago by the NRA staff, writing in the American Rifleman, on the Magnum Research MLR .22 WMR Barracuda:
https://www.americanrifleman.org/articles/2015/12/3/magnum-research-mlr-22-wmr-barracuda/
These results border on astounding to me and can't be written off as a fluke. The authors shot 5 consecutive 5-shot groups at 100 yards with three different ammunition lines. Their average group size over all 15 consecutive 5-shot groups of .91" is simply amazing--better than almost anyone has obtained with this cartridge even with top bolt guns.
So, if I were interested in purchasing a .22 WMR semi-auto (which I'm not), I think that this would be my choice.
That Barracuda sounds almost too good to be true. The SD figures given in the article speak volumes about the level of .22WMR ammo consistency, yet the reported group sizes are quite good. If these results are true, this semi is an as good or better shooter than Anschutz bolt actions that cost considerably more.
Have they been able to replicate the results with different guns of the same model? That seems beyond anomalous to me. It's an astounding result to be sure, but ultimately from 75 shots from a single gun on a single day. It's also hard to turn up other reviews of the same platform that also show or record groups.
I agree that the SDs of the velocity figures are large (although based on only 10 shots for each ammo)--suggesting something on the order of 100+ fps extreme spread (it would have been nice if the ES for each had been reported). Depending on the zero range, we might expect something like .3"-.4" vertical spread at 100 yards between the lowest and highest velocity round in each group. Despite this, the group sizes are extremely good. I don't think there's any doubt that the results "are true." Shooting 15 consecutive 5-shot groups (75 rounds in total) with an average group size of .91" can be expected to produce credible--and repeatable--results. The consecutive part of this is key, in that all shots in each and every group were recorded, and no cherry-picking occurred--a refreshing departure from the usual accuracy report (e.g., "shot under an inch all day long"). Shooting 5 (or even better, 10) consecutive 5-shot groups is the most scientifically-defensible and credible way to index a rifle's 5-shot group accuracy with a particular ammunition. Here, this test was conducted three times--with the three different ammos. If we want to apply a little inferential statistics to the results, it can be stated that the probability is 95% that the true mean group size is less than .98" (setting a one-sided .95 confidence interval). This is tantamount to saying that if we repeated the test (same gun, same ammo, same conditions) an infinite number of times and computed the average group size, the probability is 95% that this mean group size would be less than .98". (I should probably add that I had to estimate the SDs of the group sizes since they weren't provided, something I did from the extreme group sizes for each ammo.) So, yes, these results are credible.
I'm sure that attempts to replicate these results with another rifle of the exact same model haven't been made. And it's important to understand that these results reflect the capabilities of this model using these three ammos, under these shooting conditions. Still, given the care and adherence to good scientific method in these results (and see my remarks in the above paragraph), I'd take these results to the bank for this particular model. Perhaps we have to assume that the conditions in which these groups were shot must have been perfect, but how many other .22 mags, including the best bolt guns, will come remotely close to producing similar results under perfect weather conditions? Many .22LRs with match ammo won't do as well. And here's one last point: in my reading of .22 WMR accuracy reports, it's almost always the newer polymer-tipped rounds (the Hornady 30-gr. V-Max and Remington 33-gr. Accutip-V) that yield the best accuracy. The ammunition lines used in the American Rifleman test fall in the lower price range.
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This rifle does seem to be accurate. It is, however, apparently limited to 40 grain ammunition and cannot use polymer tipped 30 grain ammo. Thanks to South Pender for making note of the Magnum Research MLR.
fat tony
CGN Ultra frequent flyer
How about the Excel Arms .22 Magnum carbine? I have never seen one in Canada so it seems as though availability, parts, and warranty would be problematic. Lonely one off import gun - does not seem to be a good option.
