*Crickets*
Don't be surprised if all you hear in response to your inquery is crickets.
Those of us who reload, particularly for the Czech-O-Matic, are a little reluctant to offer gratuitous advice regarding reloading this volatile little cartridge.
Liability issues, for one thing.
CZ-52s have notoriously inconsistent bore diameters and chamber dimensions, not to mention heat treating / hardness of critical components - which means that a load that is perfectly safe in one COM could very well take another one apart.
For all of it's endearing qualities, the CZ-52 is not as strong as it was popularly cracked up to be. The Tokarev, even the Chicom versions, have proven to be significantly stronger. The CZ-52 has a couple of thin spots, weak points, and design flaws which have been known to let go spontaneously and sometimes painfully.
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Submitted by other Gunboarders who had exciting experiences with their COMs:
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When reloading, you really need to slug the bore, cast the chamber, analyze the variables and even then sneak up on an optimal load... conservatively.
As soon as your primers start to flatten or crater, back off and go no further. It's best if you never even push pressures to that point.
