Alloy hardness in BHN
I have data to simplify the measrement of bullet alloys. This was developed by the NRA and quoted by Harrison. The comparison was calculated from impressions in pure lead (BHN 5) and an unknown alloy,made with a steel ball. The method is simple and accurate. Too bad such info has become lost or been forgotten.That turns it into the same mix as Teracorp magnum alloy, IIRC. BHN around 16.