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Posted: 10/11/2007 4:58:08 PM EST
[Last Edit: 10/11/2007 5:32:46 PM EST by TECHguy]
Has anyone ever chronographed blue box BHA 69gr MHK from a 20" AR?

I am using the factory velocity, listed on black-hills.com, and JBM Small Arms Ballistics calculator. I was trying some long distance, 500 yrd, shooting the other day and I was running about 8-10 inches low, using the info that I had gotten from the calculator.

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