sentences:  They have used this cartridge extensively to create powerful loads by handloading.Factory rifles in 6.5×68mm normally have 250 mm to 280 mm (1 in 9.8 to 11 inch) twist rates, which are too long to adequately stabilize modern long heavy 6.5 mm bullets.This slow twist rate was chosen since the bullet jackets used in the 1930s were not strong enough to cope with the forces generated by the magnum muzzle velocities of the 6.5×68mm.