I have a notion there used to be another metal alloyed with lead meant for shot which helped it form rounder spheres when dropped from shot towers by increasing the surface tension. I think it was 0.1 to 0.2 percent arsenic. This made recovered lead shot a bad source for casting lead because that also interferes with good fill-out in the corners. Perhaps this is no longer done. Maybe one o' the older guys will recall what i'm thinking of and let "us" know if that's still the case.
Tom
I was going to bring this up also. I recall reading about arsenic in lead shot, but I'm not sure when or where I read it. Maybe the Lyman 2nd Edition Cast Bullet Handbook. Maybe not.
