 By 1958, Remington was obliged to increase the 722s twist to 1 in 9 inches, well in excess of what is needed to stabilize a 90 grain bullet.Remington continued to offer factory ammo in 75 and 90 grain bullets.Remington also added several other rifles chambered for the .244 cartridge including the Model 740, Model 742, Model 760 and finally the Model 725.