If ALL of those powders gave you incredibly nasty buildup in your firearm(s), I would suspect one or more of the following:
1. It's the bullet (and/or its lube), not the powder.
2. You're running insanely light loads, and need to step it up a bit.
3. The lubricant you're using for the firearm(s) is collecting far too much crap, and should be changed.
You shouldn't have to scrape your pistols clean, after running lead bullets.
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Don't even try it. It's even worse than the internet would lead you to believe.
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