Quote:
Originally Posted by MichiganScott
Are you shooting 55gr or 62gr bullets or some of the heavy for caliber (75gr on up) loads? The heavy ones probably won't stabilize in a M&P15.
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AmmoLand did a test of just that-- 80gr bullets in a 1/9 twist barrel. Every shot was a sideways bullet strike at 25yds with a group of 10 inches.