As with all things, it varies, but hollow points and sabot rounds tend to be popular due to their better record on overpenetration. Frangible rounds provide a

As with all things, it varies, but hollow points and sabot rounds tend to be popular due to their better record on overpenetration. Frangible rounds provide a far lower likelihood than an errant shot will punch through the wall and kill whatever's on the other side of it (which is why they're also the preferred rounds for home defense and such too).