BH does not necessarily cause leading. Generally, you want a harder bullet if you intend to push it hard. BUT, bullet fit is absolutely paramount to avoid barrel leading. Lead bullets generally need to be 1 to 2 thousandths over groove diameter. This will help, if not eliminate, gas cutting. A properly sized bullet that is of proper hardness for a given load will leave your barrel just as shiny as it was before you took your first shot.
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~~IllinoisCoyoteHunter~~
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