With a bullet seated, I don't think a 458x2 will fit into a 264 or 7mm Mag. Might go into a 300 Weatherby or STW.
I had a 450 marlin reamer modified to use the standard magnum headspacing (.220")and it worked out fine. If a person wanted the Marlin headspacing, it could be done with a boring bar. GD
Greydog, could you please explain what they "altered" on the 450marlin reamer. Couldnt a guy use an unaltered 450 marlin reamer, but standard magnum gauges? I thought the only real difference was the belt length... (but I dont have the cartridge drawings in front of me so I could be wrong)
