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Thread: Groups going from 1/4" to 3"
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May 16th, 2017, 08:25 AM #1Member
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Port Matilda,
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Groups going from 1/4" to 3"
Was out shooting the CZ 527 Varmint in 223 (1 in 9 twist) yesterday. I was shooting 1/8 to 1/4 inch three shot groups at 100 yards all day. When I went out to 200 yards my group sized increased to about 3 or 4 inches, not just once or twice, but with every group that I shot. Came back to 100 and they were all within 1/4 inch again.
The load I'm using is a 50gr V-Max, 21.9 Gr of IMR 2198, CCI Small Rifle Primer, and C.O.A.L of 2.220. This is a load that I worked up for a 1 in 12 twist rifle, but it shot so well at 100 yds out of this rifle that I just stuck with it. Is it possible that the fast twist of this 1 in 9 twist rifle is over-stabilizing the 50 gr bullet, but only after 100 yds?
I really don't want to have to go to a different bullet because I've had great success with the 50gr V-Max, but as most of my shots on whistlepigs are well over 100 yds I just may have to. Any advice would be greatly appreciated!
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