Steve: Who knows, that particular load might be a bit too hot for your particular Tok. 5.1 of Unique is not a over-charge but with a 100 gn bullet, pressures may be up.
Your firing pin may be dragging a bit but when you say 'gouge' - do you mean a scoring of the primer material or do you see what appears to be a double indent? If you have scoring, that's one thing - a double indent can mean a hot load.
If you know how to disassemble that Tok, I would pull the firing pin and check it for burrs or sharp edges and re-sinstall with new Wolf Springs (Ardmore, PA). Wolf carries entire spring sets for the Tok, for both 7.62 and 9mm calibers. You should also be able to 'clean out' the fining pin channel and check for dirt or burrs that may prevent the fining pin from retracting properly, and on time..
BTW, the pin that hold the firing pin in place in the Tok is a 'split pin', even though mine looks like a screw, it is a pin and it requires a specific 'split pin' punch to drive it out so you can get the firing pin/spring out. I do not drive my pins out all the way, I usually drive them out just far enough to get the firing pin and spring out but not have to worry about compressing the 'split' end of the pin to get it back in.
I would also check with the major distributors for Tokarev parts and pick up another firing pin or two - they are usually somewhat soft and should probably be replaced regularly (like every 5,000 rounds maybe).. JMTCW and HTH.
