.223 Rem - 77gr Sierra Match King with VihtaVuori N540
The 13th installment of our Mk 262 Mod 1 clone series.  VihtaVuori N540 is the primary test powder but we also shoot some groups with Accurate 2520, IMR 8208 XBR, and AR-Comp.  Test bullet is the 77gr Sierra Match King with Cannelure.

VihtaVuori N540:  http://bit.ly/2Ihq7NJ

77gr Sierra Match King with Cannelure:  http://bit.ly/2KUFRYV

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