What are the advantages of buying a slug gun over buying a 12ga shotgun. My understanding is that a slug gun is a 12 ga with a riflled barrel that shots slugs. Can they shot buckshot? i also understand a 12 ga as in the remington 870 shots rifled slugs and shot. Finally.... Over and Unders and side by sides ... are they practical guns for deer hunting (mainly with slugs) or are they better for target shooting and birds.I mainly hunt with a bow, looking to cross over any help is appreciated, thanks in advance