tuc22, there's hogs and then there's hogs. If you're talking about the younger ones, weighing under 100 pounds and thus more tender and tasty, it's probably okay.
As usual, shot placement, shot placement, shot placement. Clean kill and all that.
Always remember that the 7.62x39 is considered, much like the .30-30, as marginal for deer at ranges beyond 100 yards. Some of it has to do with the rather poor sights commonly installed on the rifles for those cartridges, as well as the trajectory, etc. It's not that they won't kill; it's that they won't anchor an animal in the event of a poor hit.
FWIW, Art