User blog comment:Griever0311/Ask A Marine Part По-русски/@comment-1260687-20100324154421

@Apepa: To be honest, I've only fired the 6.8 SPC, so I can't say anyhing about the Grendel, and I never fire it at a living target, so I can't say anything one way or another about its efficacy; the recoil wasn't much different than the 5.56mm, so I imagine the only difference would be improved stopping power, though I imagine the adoption of 6.8mm would further complicate supply issues while still not offering the same stopping power and penetration as the 7.62x51mm round. I say go hard or go home.