I've shot hot loaded 45 / 70's ( like a mule kick ) . 300 win mags, 338's , 3 1/2 in turkey load, single action army 454 casull's with full house buffalo bore ammo ( the worst of the lot ) 300 Ultra Mags , 7 Ultra mags, , and haven't developed one yet

I'm serious about the 257... If anyone has one they would like to swap p.m. me. That's actually what I've been looking out for the last year or so. Mark V's in 257 just don't appear that much.