Doesn't seem to matter what cartridge we're talking about, their champions want to make a case for them being more than acceptable, why? "Cause I done it!". Well lot's of things are possible, some with such regularity that it seem's like a good idea. But because lots of things can be done, doesn't make them prudent!
I think far to many people are willing to go underguned for deer, of all sizes, for no reason other than they are not dangerious. There's any number of accounts of dangerious bears being killed with very small calibers yet nobody jumps up and say's, "get a 250 saveage for a bear gun, great rifle, I've killed one with it!" Kinda foolish huh?
Then there's the other side that think's only a 300 magnum is acceptable for deer, presumeably even the smallest of them. Why? Well the only shot you might get may be at 600 yds in high winds and you may have to shoot thru some trees!
It's sad the excuses that some people use to justify the choice of cartridges for one animal or another that are not really prudent choices. As I said earlier, make it a dangerious game animal and the thinking changes. Marginal and less than prudent choices only exist when the animal doesn't fight back!