For those wanting a load utilizing an expanding bullet that penetrates very deeply, this is it. This lead free, all copper Barnes TAC-XP bullet will penetrate better in flesh and bone. Buffalo Bore is utilizing a flash retarded powder in these loads, so the vision of the shooter will not be significantly impaired after the first shot. In small cartridge casings such as 40S&W, 9mm, 380Auto, 357 Sig, etc., these long-for-weight all copper bullets crowd precious and limited powder capacity, requiring Buffalo Bore to load the bullet to lower velocities. However, the advantages to these Barnes all copper bullets outweigh the disadvantages for most applications.