I came across 120 Lbs. of Pb I thought was COWW's...as you can see, the ingots look fine...only problem is this, they are way too hard for WW's.
Assuming the extra hardness is from Zinc, Zn, alone...how much pure Pb would you mix with this 120 Lb. batch to bring the hardness down to an acceptable low pressure pistol Pb blend...say 14 BHN?
Attachment 194477This is a picture of 12 of the 24 ingots that I've tested for BHN. ^ It looks fine to me, no cottage cheese Zn excess here.
I don't have any experience thinning down contaminated Zinc/Pb...are there any other problems I may incur doing this?
*I think I've heard that Pb can tolerate a 5% blend of Zn...but not sure if that is correct.
*I don't have any idea either of what %'age Zn represents in BHN numbers.
Any suggestions you fellas have will be greatly appreciated...charlie