If the chunk of lead you want to buy is about a pound or two drop in on concrete. If it is hard it will ring. If it is soft it will thud. Dental lead, clamp on wheel weights, and chilled lead shot melted into ingots will all ring, and they are all about 12 BHN. For mini balls like the Lee with thin skirts you will want SOFT lead. The skirt is thin, and could break if the lead is hard. Also hard lead bullets will be "bigger" in diameter but lighter than soft lead bullets. Bigger bullets = hard to get down depending on the bullets size and the bore of the gun. Ron