.308 definitely has a sharper recoil . . .
in a gun like the AP4 DPMS. I have one, and a .450 BM, and the .308 has more of a crack vs. a shove, if that makes any sense. Both are totally tolerable, though.
I actually have 3 DPMS .308's. I have the AP4, the .308B (heavy 18" barrel), and a...