As I was seating some 35 cal gas checks on some 358156 for the first time and pondering the meaning of life the universe and everything, I got to wondering what is the high and low end of the BHN range for gas checks.
Straight lead is probably not worth the effort and on the high end there is likely a hardness where a gas check doesnt matter.
For this batch I cast the bullets out of my 14 BHN that I have been using for rifle bullets, but I also have a bunch of 10.4 range scrap that I have been using for .38 wadcutter.
(BTW the answer is 42 of course )