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I don't know. I was using Rem 220 subsonics, I believe it was open tip match. I have not shot any reloads yet, I just put this AR together. I went out to a buddy's house in the country for dinner and shot five rounds to make sure it worked properly. I was really surprised how loud the first one was. Is it possible factory ammo could go supersonic? Friday after Thanksgiving I am going to play with it when I have plenty of time.
BTW it was about 75 degrees and less than five hundred feet elevation.
Last edited by Shadow 300; 11-15-2012 at 05:59 PM.
Reason: Added elevation temp comment
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