I was thinking of reboring a 30-30 to a 375. Just wondering if anyone has any experience with this cartridge and how did it work on game?
If you rebore a standard Winchester 94, I would only shoot 38-55 level loads through it. A Marlin 336 might be ok, but the Winchester 375 (Big Bore) is built on a different receiver (reinforced)than the standard model 94 30-30.
To answer your question, the 375 is substantially more powerful (IMO) than the 30-30. I also shoot 38-55s through my 375. But, I have taken whitetails with 30-30, 38-55, and 375; seriously, I don't believe that any one of the three was any more deadly than the others.