450Bushmaster.net

A fellow Sheepdawg shared this with me today and I found it extremely enlightening. It really addresses AR 15 issues and behaviors, other than just the use of steel versus brass cases. While the ammo performance information will be found valuable by the 5.56 NATO shooters, The internal ballistics, pressure waves and AR 15 funtional characteristics you will read in this report will possibly benefit new AR 15 owners of all different calibers.
Enjoy.
http://www.luckygunner.com/labs/brass-v ... ased-ammo/