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Posted: 3/17/2005 12:42:31 PM EST
New rifle with 1/9 twist(I think). What should I shoot in this rifle? Do I need to skip shooting any mil spec 3131A in this rifle? Have not fired a shot yet, so any advise is welcome. Do have a Bushy 16" AR also. Thanks.
Link Posted: 3/17/2005 12:57:30 PM EST
From the Ammo Oracle:

Military M16s have slightly more headspace and have a longer throat area, compared to the SAAMI .223 chamber spec, which was originally designed for bolt-action rifles. Commercial SAAMI-specification .223 chambers have a much shorter throat or leade and less freebore than the military chamber. Shooting 5.56 Mil-Spec ammo in a SAAMI-specification chamber can increase pressure dramatically, up to an additional 15,000 psi or more.

www.ammo-oracle.com/body.htm#diff
Link Posted: 3/17/2005 1:05:54 PM EST
50g Hornady Vmax
45g Win varmint
both will work really well.
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