Heres a thread that covers all the possibles for what's causing your tumbling. Unless the barrel is completely shot out, which it likely isn't, you should be able to sort out the issue. I reckon your gun is just fine, try stepping up bullet diameter or velocity or maybe you are putting too much crimp on your loads. Lots of info if you search and it keeps coming back to the same set of circumstances for what could be causing your problem.
CZ Shadow 2 - 147 gr tumbling - 9mm/38 Caliber - Brian Enos's Forums... Maku mozo!
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