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I planned on using the same Coated lead bullets
dgbullets.com
That I use for 10mm to run in the new Sig 229 .40. The bullets are plenty hard and I have run them hot without issue but then started thinking .. will the coating foul up the feed ramp? Are there other potential issues?
I have never used coated lead for semi auto

40/10mm 180 grain, Flat Point, Beveled Base, No Lube Groove
40/10mm 180 grain, Flat Point, Beveled Base, These lead cast bullets are made from 92-6-2 alloy and are then coated in HiTek Supercoat coating.

That I use for 10mm to run in the new Sig 229 .40. The bullets are plenty hard and I have run them hot without issue but then started thinking .. will the coating foul up the feed ramp? Are there other potential issues?
I have never used coated lead for semi auto