i bought a new to me 1976 mini14 today. cal.223. the rifle is about 85%-90% . i have never owned a .223 cal. weapon. intended purpose is plinking , plugging varments and other useful things . if anyone has input on the round or the weapon fire away. i am interested to know if all available bullet weights will stabalize in the ruger ranch rifle. loaded ammo i have seen at midway varies from 40 to 77 grains.