RE: 8MM Mauser project
Yep, just found that out. My Speer number 12 showed them using this same gun for load testing. It is 1:9.5". I looked at ER Shaw. It would cost about $350 to convert the mauser to another caliber, about the cost of a new gun, but I would like to have either a wildcat, or a less popular cartridge, and he does chamber a lot of calibers.