I've been getting some low shots in groups fired from my CZ 455, with .17 HMR, so decided that it was because the firing pin was hitting high on the rim fold, so I ground the top of the pin to eliminate the poorer ignition and, after trying several groups, found that the low shots have been eliminated.
It's a cure that we've used to eliminate the problem on .22LRs and I was getting them on the .17 and .22 WMR. The groups are now much rounder!
JP
It's a cure that we've used to eliminate the problem on .22LRs and I was getting them on the .17 and .22 WMR. The groups are now much rounder!
JP