I don’t have any hunting experience with the 6.8 SPC, but it certainly has caught on with a small but devoted group of fans. One of them is Steve Johnson, who happens to work for Hornady and has quite a bit of field experience with the 6.8, mostly on hogs.
Johnson says the 110-gr. BTHP works very well on game, particularly at 6.8 SPC velocities. He said that bullet will expand reliably on deer-sized from point-blank ranges out to 200 yards.
“Impact velocity is the critical thing with that round. At 6.8 velocities that bullet will hold together very well. Drive it at .270 Winchester speeds, though, and that’s a different animal,” he said.
So as long as the bullet is exiting the muzzle at 2,500 fps, versus the 3,000 fps you'd see with a 130-gr. .270 round, this bullet should turn the lights out on any properly hit whitetail.