I have a 30 cal mold that casts .311. I have slugged my 8mm and it comes out to .3105/.324. I was wondering about the possibility to use my 30 cal mold and patching up to .325+. Granted the nose on the 30 is only .301 so my thought is to patch the driving bands only.
Feasable, or should I just break down and buy an 8mm mold.
Opinions?