[Dave Waits]

Originally Posted by DrHenley

I LOVE Trail Boss in anything .45! I was using it a long time in 45 Colt before trying it in 45 ACP. I was having bad leading using HP-38 and cast bullets, and since I didn't have leading in the 45 Colt, I tried Trail Boss to see if that helped and it just about eliminated the leading.

Meters better than I expected. With an old Bonanza powder measure it's right on the money every time. With an RCBS measure it varies a little but still accurate.

Now I use it with both cast and jacketed, same load for both - 4.5 grains with a 230 grain pill. No leading with straight WW. With softer lead I get a little streaking near the chamber in one or two grooves.

Doc, how can the powder used have any effect on leading unless you were driving it near max charge? Velocity is what causes leading. I'm a big fan of HP-38/WW231 in the 45 and also Unique. No problems with lead buildup at all.
Average velocity for my HP-38 loads is 835fps.