This video tests the accuracy and velocity of four different AAC 5.56 ammunition loads (69gr HPBT, 69gr Sierra Match King, 77gr OTM, 77gr Sierra Match King) fired from a 16-inch Bear Creek Arsenal upper with a 1:8 twist rate. The instructor notes that the rifle has become more accurate as it has broken in. While most loads performed well, the 77gr Sierra Match King showed inconsistent results, particularly in five-shot groups.
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