308 vs 6.5 Grendel vs 6.8 SPC

300 won't shoot deer at 400 yards, but unless you are one the plains or out west, 200 yards seems like a fairly decent range. Out of the 200 or so deer I've shot, probably 5 have actually been beyond 200 yards, and maybe 2 close to the 300 yard mark. Dunno....maybe I'm doing something wrong.