Most of my 2 dozen or so have been with a .25-06, 100gr. Barnes X or TTSX, from a B-78. I've also used 100gr. ballistic tips, .257Wby with 110 Interbond, .260/120 TSX or Ballistic Tip, 7mmRM/150TSX, .32Rem/170Speer, and 8mmRM/200TSX. All worked well, and I see no reason any reasonable bullet in a 6mm wouldn't do just as well. Hunting on the open prairie seems a good match for an accurate single shot and fast cartridge.
Last edited by DHN; 08/20/20.
