sentences:  With the help of a muzzle brake, the 6.5×68mm's recoil is reduced to tolerable levels.Extremely thick brass results in 'only' 5.58 ml (86 grains) H2O cartridge case capacity for the 6.5×68mm.A rare feature of this German rimless bottlenecked centerfire cartridge design is that it has a slightly rebated rim (P1-R1 = 0.3 mm).