Nobody has mentioned a 12 gauge slug gun yet, with slug or round ball. I guess I'll be the one to add it to the thread.
For <50 yards, which would certainly be considered "close-in", a smoothbore or rifled 12 gauge slug gun will get the "close-in" deer stalking job done just fine. Rifled slug barrels and matched slugs going a tad further to 75-100+? yards.
