I have reloaded unjacketed lead bullets for my 45 ACP with no problems of leading in the barrel (probably because the bullets were waxed).

I've always used jacketed bullets for my M1icon, O3, and O3A3. I am concerned about lead build-up if I use unjacketed lead bullets because of the increase in bullet velocity compared to that in a pistol.

Should I be concerned? Any input on the matter is appreciated.
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