Do you note there is no crimp groove on those bullets that jumped. It is difficult if not impossible to get a good enough crimp on a smooth bullet to keep the bullet from moving. Target loads have taper crimps, but hot loads need a crimp groove to keep the bullet from moving. The minimal weight of your handgun is a big contributing factor, but if you want to continue to use it, obtain loads loaded with properly crimped bullets that have a crimp groove.

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H Richard
SWCA1967 SWHF244