I don't know, I guess I give up. If 5 of the manuals [(2) Speer, Hornady, Lyman, Nosler,]I listed use +P data and they don't give the velocities others have claimed, and the 257 AI data doesn't give the velocities stated for the standard 'bob then something is funky somewhere.

I don't drink or Smoke. I spend my money on gunpowder and gasoline.