Since I have been getting into this hand gun hunting stuff I have of course been harassing my little brother about doing it too (I say little but he's 27 lol)...

He has a 3.5" barrel 40 S&W and was wondering if with some of the buffalo bore ammo would it be efficient enough to hunt deer 25 yards and in?

He understands the 40 is probably marginal at best, just curious. Thanks