Ill post a range day thread when my dies come in. I never planned on hand loading for my ARs but prices are getting ridiculous for right now.
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Ill post a range day thread when my dies come in. I never planned on hand loading for my ARs but prices are getting ridiculous for right now.
Last edited by GUNSLINGER733; 12-27-12 at 02:24. Reason: ...
rcsperformanceonline.com
Lighter bullet weight alone will not cause an increase in wear and tear on a 1:7 barrel. Your friend might be referring to the opinion of some military personnel who noticed a reduction in barrel life with the 1:7 twist barrels, which was why the military adopted the 1:9 twist barrels for widespread use.
I think you will find heavier bullets in the 62g-75g range will be more accurate than lighter bullets in the 45g-55g range when shooting run of the mill factory ammuntion. You can shoot tight groups with lighter bullets out of a 1:7 barrel if they are high quality bullets like the Hornady or Siera bullets, but a lot of folks shoot whatever is available like M193 ball. When I first started shooting high power, I shot a Colt HBAR with 1:7 barrel. The HBAR shot 55g bullets into 2-1/2 MOA 10 shot groups out to 300 yards and 1-1/2 MOA groups with 64g and heavier bullets.
If you can shoot 3 MOA out to 300 yards with 55g bullets, I would not get too excited about buying more expensive ammunition if you are not shooting CMP matches.
Last edited by 7 RING; 12-27-12 at 13:59.
I got that information from members of the U.S Army Marksmanship Unit and the USMC Marksmanship Unit when I was at Camp Perry several years ago. They told me the 1:9 barrels lasted longer than the 1:7 barrels on the standard issue M-16s. We did not discuss the twist rate on the carbine barrels.
Last edited by 7 RING; 12-27-12 at 14:52.
From what I know and understand, bullet weight has little to do if anything with the twist rate of your rifling. It's the length of the projectile being fired. Heavier bullets tend to be longer and thus need a faster twist to be stabilized properly. Bullet weight alone has nothing to do with stabilization by rifling and that explains the wildy different results people are getting. Some bullets are longer than others due to their design/construction/materials used. Somebody correct me if I'm wrong here.
Last edited by Shao; 12-27-12 at 19:29.
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