1 id dog, if you mean the 275gr XPB, I think it work like a solid at T7 velocities, and at over $1 each, you'd be better served shooting a hard cast bullet cuz it's gonna have better terminal perfornance with a nice wide meplat. The Cor-bon 275gr XPB load tested at 2068fps in John Taffin's 500 Handi test, you can read it in the FAQs.
Tim