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11,374 Posts
I use the Lee factory crimp die with ALL my .223 loads. If the bullet does not have a cannelure, I keep the crimp light to not bugger up the bullet. For basic paper punching, a crimp is not needed and may be counter productive. Some bullets do not respond well to having any degree of crimp as the jacket gets deformed and accuracy can go to hell in a handbasket. If the ammo might be used in a fight, crimp it to prevent bullet set back and putting the rifle out of commission.
