At the police range on automobiles the soft S.W.C.-hp F.B.I. failed to penetrate metal and glass. But the hard cast S.W.C. +p 900fps did very well. I carry the S.W.C. load 900fps. In my 38 specials. One's not gonna say gee that 900fps hurt more than the 800fps load. Placement is Queen! All else does not matter.