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Posted: 2/8/2009 8:38:01 AM EDT
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I finally got my new Barrett M95 out to the range (with the scope mount loctited) to zero the scope (Leupold Mark 4 4.5x14x40 LR/T). Here is a pic of the groups I am consistently getting now @ 100 yards. Most of the variance in the shots at this point is due to user error, I think. My question is how to measure group size. I've never really measured accuracy with my AR-15. I've always just tried to get tight groups. Thanks!
Dan The one that's covered up is an errant .223 round from trying to zero that scope. 
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Pick the two impacts that are the FURTHEST apart. Measure from the inside of one round to the outside of the other. Pick the same place on the edge on each so you aren't cheating yourself. That's your group size.
It's tough with shoot-n-see's. Much easier to use white or near white paper targets as you can measure from where the bullet wiped the paper for one shot to the same point on the other. If your shots get so close you can't discern edges, just measure from outside to outside and subtract ONE bullet diameter, in this case, 0.510". For shooting for group, the best results will generally be had with white (or near white) targets pasted to cardboard. Cardboard with a white side also works really well. I just use those birchwood casey 1" orange spots for aimingpoints, stuck on the white paper or white cardboard. -David Edgewood, NM |
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Quoted:
RFMissile, Thanks for calculating that for me. I'm going to have to see about getting a copy of that program. Dan http://www.ontargetshooting.com/ |
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