My Husky 98 mauser in 9.3x57lobs a 286 grain softpoint at approx 2050 feet per second. I believe the 375 flanged nitro express 2 1/2 shoots the 270 grain bullet a roughly 1900 feet per second and my husky has a 1x14 twist. And I believe that the 9.3x57 does this at 40K pressure. Frank