Got a Rock Island .45. No matter what I do, it keeps leading.
Here's what I've tried:
3 different powders including Bullseye, Red Dot, and HS6, using start loads and working up to near max.
All with a Lee 200 gr SWC bullet. In THEORY this bullet fits the barrel well, dropping 1-2/1000 over groove size. I'm loading them as dropped.
Used LLA, Felix lube, and 50/50 lube.
Water dropped Wheelweights, aircooled wheelweights, and 50/50 soft lead and weights mixed.
Nope, they ALL lead.
So I lapped the bore, as I could see a few chatter marks on the cutting. It smoothed out nicely (so it looks).
Yesterday I shot the gun again. Fairly normal load, 200 gr SWC, 3.5 gr Bullseye, ACWW, LLA.
Not only did it still lead, it leaded horribly. Big chunks of ironed on lead the size of a flattened pea were coming out of the barrel. Equally bad at the chamber end and at the muzzle, and all in between.
I'm at a loss here. I'm thinking of ordering a new barrel (used?) and saving this one for jacketed.