I can not remember where but last night I came across some data the had the 440 grain at 1925fps and the 400 at just over 2000fps.If that is true then the .500 should be a monster rifle round.I think I am still going to get the new 45-70 handi-rifle with the 24 inch barrel.http://www.hr1871.com/Firearms/Rifles/hunter.aspx