Bob the .223 ammo is as common as grass. Many people just use the .222 ammo in the AR ... fires the same .. like a .32 special deer rifle can use 3030 cartridge also. the .223 is typically a hard ball or full metal jacketed round but you can get the .222 in hollow points if you so wish. That is a varmint round for woodchucks etc. Nothing special about the AR round or the AK round .. common rounds for hunting also.. The weapons however are designed for military use via its rate of fire and its setup. Not designed for hunting at all but bolt action hunting rifles can and do use the same rounds in a number of bolt action sports guns, 30 cal is a standard deer round. 222 is a standard varmint round