I've been brainstorming having a Bowen cylinder blank chambered to 7.62x25 and fitted to my .30 Carbine Blackhawk. Anybody done this? Was case setback freezing the cylinder a problem? I'll be using handloads in Starline brass, no milsurp ammo. PTG offers a CIP reamer. I figure that TOK has less body taper than .22 Jet or Harvey K-Chuk and only minimal bottleneck, and figure if chambers are kept clean and dry it should work. Plan is to use mostly cast bullets, but may try some .309 Hornady XTPs for varmints.
Anybody ACTUALLY DONE THIS? What was your experience?