Leading Problem .45Colt

[hylander]

I am getting leading around the edge of the forcing cone and in the first inch of the barrel.
What would be causing this.
I have only fired 50 rd.
My Load:
New Starline Brass
200gr. Bear Creek .452
7.5 and 8.0 gr. Unique
OCL 1.585
Win. Primer

My Bore is .451
My Throats are .451

What do I need to change

[Castaway]

Two things come to mind.  Bump the charge up a little and it may quit, also, try some Lee liquid Alox on the bullets with or without more Unique

[West Creek Charlie]

Hey Hilander

I've had the same problem. Some fixes come to mind.

Switch to a softer alloy of lead - most storeboughts are about 16bn

Better Lube in the lube grooves - aka Felix lube, LBT Blue, NRA

Hone the throats out a little to .452 if you are using .452 bullets

Do all of the above and my guess is it will solve your problem - it did for me.

I have also had luck with the Liquid alox as well. Try that first. Liquid alox worked for me as well and might be a good solution for if you dont cast your own. It is a little messy but it works.

My guess is too that you are getting a little leading deposit inside your chamber just before the chamber throat. Honing the throats might help with that.