Hmmm, perhaps... .

But, what else do they have to do?!?!

All that good food, they need to work some of that off!!!
BUT, most likely, it would work well..... But then, I don't recommend people shoot that far, anyway. I don't like to, but I'm known to. And on hogs, I just don't care... .

If he limits himself to 800 yards, that's 8"... ... . of course, we both know, a good shot can be made bad, especially by game moving during bullet ToF, flinching, or just plain windage or shooter error... ... .
If you put a 10" plate on an elks shoulder, and could hit it, I'd think that'd be a pretty decent shot..... high, and you break the spine, low and you destroy the heart, lungs, and shoulder... . And remember, you're just under 10"..... I don't think that sounds bad... . especially compared to some of the lunitics they allow to shoot, let alone hunt game!!!
