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View Full Version : AR barrel twist, bullet weight


Odd Al
08-11-2003, 04:00 PM
Way back when, back before the war, I was in the Marine Corps. Part of qualifying with the M-16 was 10 shots, prone, at 500 yards against a man sized target (with iron sights). These were the easy points. You had 10 minutes to take your 10 shots. This is what I consider "fine" accuracy. I would like to reproduce this accuracy with an AR style rifle, but now that I look around at some, there's so many variables.

For instance, I think (and correct me if I'm wrong...) that the military uses a 1:7 twist rate in their barrels. They also chose a round that would stabilize with this twist rate, the SS109 (right ?). So if I find an AR with a 1:7 twist barrel, and use ammo with the same weight as SS109 (what's its weight, anyone know?), that should be a good start on re-creating an accurate AR, right? I would like to avoid buying something too far removed from military specs. Anyone got any advice?

5toolman6
08-11-2003, 06:03 PM
This may help you.

http://www.bushmaster.com/faqnew/content_by_cat.asp?keywords=&do_search=1

akjunkie
08-21-2003, 02:19 PM
hmm, try this link.. i found it very informative

http://www.ammo-oracle.com