I've fired 10's of 1,000's of Berry's plated bullets through my 45 ACP Glock pistols. Lead bullets with a BHN between 12 and 18 are, also, acceptable to use. You've just got to watch the barrel more frequently for signs of lead buildup and be ready to brush that barrel out if it starts to lead up on ya. (Mine never have; but, then again, I know what I'm doing with lead.)