swhiteh3 Posted August 28, 2015 Share Posted August 28, 2015 I'm writing this for a friend who is not on this forum. The other night while I was there, he was evaluating a used CZ Czechmate he had come across. He had two 9mm major loads worked up for it, and chrono'ed them both. The gun was running well. After chrono'ing the two lots of ammo, he went about accuracy testing the gun, and the targets consistently came back with two groups on them - one in the center of the target, and one 4-5 inches high (this is at 30-40'). We transferred to shooting off a bag, and the same thing happened. Both lots of ammo did the same thing. So I took the gun, and it repeated for me off the bag. I tried shooting offhand standing, and it did the same thing. I tried a lot of my 9mm minor Production ammo, and it did the same thing. Interesting, when we watched more carefully, the impacts alternated from "true" POA to a few inches high *EXACTLY* every other shot. It's the craziest thing I've ever seen. We shot over 100 rounds through the gun on paper, two different shooters, two different positions, three different ammo lots, and EXACTLY every other round goes high. The C-More *feels* firmly mounted, but we did not have metric allen keys to confirm. Everything felt rock solid though. Slide lock-up felt good. The gun ran great. Any suggestions? Has anyone ever seen this kind of issue? Link to comment Share on other sites More sharing options...
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