I have a new Lee mold, .45 230gr TL SWC(TC actually). I've messed with it quite a bit, finally everything working right to make some .453" boolits, though they weigh 240gr+ instead of 230.
The issue has been leading. I shoot them unsized, with two coats on alox/jpw lube. A moderate charge of unique pushes them at 700fps. I have two .45's, one slugs at .4505, and the other at .4525. I tried some harder alloy, and some softer alloy.
I finally got the leading to stop in the tighter barrel with a second coat of lube, but still get a little in the other gun. It just seems to me that with a good-fitting boolit (.453" in a .4525" barrel) and low velocity, it shouldn't be leading at all.
I never had any problems with my old Lee .45 RN TL boolits with alox tumble lube, and read a lot of comments about how great the Lee 200gr SWC boolit is, as well as a few comments about leading with this TC TL boolit.
Any experience regarding boolit design and leading, or ideas on what I'm doing wrong?
I know the whole tumble lubing thing seems to be a bit controversial too. I tested some .44 mag 250gr boolits the other day, regular WW alloy sized to .430 with some old black Lyman lube in old-fashioned lube grooves. They were moving along over the chronograph at 1500fps, and no leading in the barrel.
I've read some posts about successfully using one very light coat of alox/jpw tumble lube, but that has not worked well for me with these .45 slugs. Even two coats seem to be not enough, unless there's another issue at work here.