Their factory specs (I called) call for 2710 from the 24" pressure barrel and 2900 from the 120's. Their test sample was a little slow on that but, I am slower still out of the 28" Ruger. FWIW, Hornady used to load more H4350 in the 140's than is specified now. I will load a wee bit more powder in the case and see what happens....