I don't believe there was a single "short" barrel which made the top-10 cut. When it was all said and done, the three top barrels were of "German manufacture", all the same manufacture, all "Long", full-length, (maybe 24 or 26"?). IIRC, there were about 40 different barrels in this study. All rimfire, all shot from a 2013 action, all shot out of the stock. Here's what I can undeniably tell you: At one point, there was a "study" commissioned of barrel lengths and barrel makers. We'd shoot a short barrel, then put a "bloop tube" on the end, to extend our sight radius.
Many shooters did, especially in the "accuracy" game of Olympic prone and 3-position. Chamber diameter, throat, lead, primer composition, and charge weight. There are a bunch of variables that determine how long it takes for the projectile to "outrun" the pressure generated. Now, the "push" continues after max pressure, so just because all the powder's burned out, it does not mean that the GAS is not still working on the base of the projectile. Yes, the propellant is actually almost all burned out in the first inch, depending upon any cylinder gap or throat. Think they would change it but what ever. 22RF is if you want to duplicate a contour/finish length etc.for restoration.įunny though the Saami spec. The only other reason in my opinion for a long barrel in. With the shorter barrel length the bullet is in the barrel for a lesser amount of time and usually shooters will see there average for scores (not they're highest score) go up because of a less of a tendency to push the shot etc. I'm getting ready to start rebuilding another Winchester 52 International type match rifle but instead of running a 28" barrel I'm going to finish it at 21" (I can always cut a little more off) and for the iron sights I'm going to run a bloop tube to give me the extra length for the sight radius. The only reason to run a longer barrel length is for the sight radius if your shooting iron open/match sights etc. Anything past and your not gaining anything. Going totally off of memory one of the gun manufacturers did a big test on this and if I remember correctly it was around 18" or 19" for the most velocity gain. That is the main downside of switching to subs. 22LR rounds are still cheaper, but not by as much as I would like. My 5.56 rounds are running about 40 to 45 cents per round (Lake City green tip) so the. The trade off of needing more elevation can be managed at my max range, hence the only big trade off is the cost. The benefit is that the round will come out of the barrel already being below the transonic barrier and hence avoid the instability induced by flying through that barrier. Checking the numbers, I now realize the subs can get out there (just barely) with my scopes, though the droppage will be more like 150 inches versus the 115 inches with the supersonic. 22LR at the maximum distance, to better simulate wind and drop issues. I finally realized that subsonic will do a better job of meeting my goals.
I'm now switching to Eley match subsonic, which looks like it will be running between 24 and 34 cents per round. I've been shooting Federal AM22, 40gr, 1200fps and getting it for between 8 and 14 cents per round. And subsonic might be different from super sonic. 22LR indicates between 16 and 16.5 you will achieve max muzzle velocity, so if "optimmum" means the length at which you acheive max MV, then I agree with the 16-16.5 length, for.
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