November 19, 2009, 3½ year old Bison Bull @ 30 yards. Broadside through the axis bone. I built myself a pre-64 M70 in .416 Rem Mag. 350gr. Barnes X, Mcmillan stock, Krieger barrel and a 1-4X Trijicon four post with the green dot. He went straight down. No meat damage. Not a real test, but it worked well. Buffalo eats great.