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Hi and welcome. Lots of debate on this. I have several Glock 20 / 40's and shoot Buffalo Bore, Underwood and Double Tap hard Cast without issue. you will need to periodically check for leading if not using the coated Hard Cast loads. I have done this for years with no ill effects whatsoever with 200 and 220 Hard Cast rounds. Cheers, stay safe and enjoy!

just check the barrel for leading after each range session