For those wanting a load utilizing an expanding bullet that penetrates very deeply this is it. This lead free all copper Barnes TACXP 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 40SW 9mm 380Auto 357 Sig etc. these longforweight 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.