Small base dies if you can get them, but the other issue might be a good annealing of the brass. As stupid as it sounds, that might be a cause of this. I had it in an old zkw465 .22 Hornet - hardly something you can get hot loads in! Factory ammo, fine, once fired first reload fine as well. Second and subsequent firings, every second mag at least one would stick and need to be popped out with a cleaning rod. Annealing helped for another couple of reloads.
Part of the issue with it I suspect is the modern dies are a slightly different profile to the early Euro spec chamber and don't quite resize enough. The was no issue with the chamber or action on that rifle, so there may not be on this one either. I would suggest the third firing thing is a coincidental thing and not witchcraft.
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