Please stay away from button rifled barrels with 48" twists. On large animals, the slugs won't penetrate in a straight line, giving exceptionally poor killing power and the shallow rifling is difficult to get rounds balls to shoot accurately unless very tightly patched.
: There are too many good guns out there, with cut rifled barrels that will work well, right out of the box, as in the Lyman GPR, probably the best rifle for the least money.
; If you want to shoot slugs, get a rifle with proper slug rifling. They are also out there, in the GPH for one. There is no such thing as a multi-purpose gun, except from the advertizers & company finance standpoint.