250 Grain MonoFlex ML
07-15-2015, 06:35 AM
#11
Giant Nontypical
Join Date: Mar 2010
Posts: 5,605
A slight difference in hardness goes a long way in expanding type projectiles. There is a reason Barnes uses pure copper and its certainly not to save money. Guilding metal is cheaper
Copper 30-35BHN
Guilding metal 45ish BHN for 5% zinc. 10% zinc is around 56BHN.
Last edited by Gm54-120; 07-15-2015 at 06:53 AM.
