I get very minimal leading at the chamber end shooting Missouri Bullets 9mm, 40S&W and 45ACP bullets (Lone Wolf barrels for 9mm/40S&W and M&P factory for 45ACP). I get no leading in stainless steel Kimber barrels for 45ACP.
What little fouling/leading I get, they are removed easily with old bore brush wrapped with copper scrubber like Chore Boy dipped in Hoppes #9. Few strokes and barrels are clean.
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