Quote:
Originally Posted by isaidme1
My M&P AR wont even stabilize a 62gr green tip bullet. I was shooting 8" high with a scattered pattern at 50 yards. 55gr xm193 shoots good tight groups. I am going to have to ditch this 1/9 twist barrel asap.
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What model M&P15 do you have with the 1-9 barrel. and the 62 grain xm855 is inherently not as stable as the 55 grain or basically any bullet that doesnt have the steel core. The steel core is not perfectly centered and therefore doesnt stabilize as well as the other weight bullets.