TTSX, I get the same sub one inch groups with the 300 gr. While 1:22 might give you sub 1" groups with the 300 gr. They will feed you all kinds of BS stating the reason is something else but the truth of the mater is they assume you are an idiot and cannot figure out for yourself that you cannot pass a. Pretty much the same as those using 11/16 x 24, 3/4 x 24, and other oddball sizes. 308 muzzle devices then wanting to sue when the rifle blows up. Them and a whole lot of others did queer threads to keep rubes from screwing on. Those are not hard figures because different powders and different bullets can cause different velocity loses. Going down from 12 to ten inches you lose somewhere around 75-100 fps, then from 10 down to 8, maybe another 50-100 fps, then 8 to 6, another 75-125 fps. Of course that varies with powder but something like H110 or Lil-Gun, which gives top velocities, the loss beyond 12 inches is minor. You might have to search but going off the top of my head, from 12 to 18 inches you lose very little fps, maybe 50 fps tops because the powder is mostly burned in 12 inches. 458 SOCOM forums, you will see where both Tony and I have posted velocity results from barrels of different lengths. You know I’m attempting to do, point me to the correct barrel.If you go to the. Tom Bowers said absolutely that a 16 inch barrel would be best for suppression and he only runs that in his 458 SOCOM rifle, I talked to him.Įdit. I am trading velocity and sound suppression for a more maneuverable rifle. That is exactly what I have now.Ĭan you see how this is a little confusing to a beginner? I do understand that I am making a trade off. What am I realistically giving up going from 12 to 8 inches when I m shooting supers? Going from 8 to 12 is only 4 inches, well going from 12 to 16 is only 4 inches. From a pure over all length (barrel and suppressor), I want the 8 inch. At best I can get 3-5 inch groups at 100 yards and that's not good enough for me. I have not had any success shooting any cast bullets and being able to get the kind of accuracy I insist upon. I got the fast twist to see if it would make cast 525s shoot more accuratgely than the 1:14 twist, and it did not. As I think I said before, I saw zero difference between my two 10", 1:10 and 1:14, barrels in accuracy or velocity shooting bullets from 250 to 500 gr. really need the fast twist to stabilize bullets that are starting at only 900-1000 fps. Plus, those wanting to shoot cast bullets in ranges from 525 up to 600 or even 700 gr.
Of course I am exaggerating some but not much. By the time the point up attitude could cause a problem, the bullet would dropping about a foot for very foot of forward travel. At extreme distances, well over 500 yards, the point up attitude will cause the bullet to start tumbling. In short, that means the bullet will travel all the way to the target with the point up.
If you shoot the fast twist with lighter bullets at super sonic speeds, you get into a condition where the bullet is theoretically over stabilized. and up, the faster twist gives better stabilization and reduces chance of a baffle strike when shooting long suppressors. No mention at all on the use of supers.A bullet does not stabilize just on twist alone, but on RPMs. Why do 1:10 and 1:14 twist barrels made? Why not a single twist rate? On Tony’s web site, the shorter barrels specifically state the barrels excel at stabilizing subsonic ammo.
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