overall, use what you're comfortable with. i have shot alot of deer with both my mossberg 20 gauge and my 12 gauge ithaca. both with slugs and buckshot. depeneds on what you prefer. my 12 gauge is my primary gun, b/c i rarely have a chance to shoot over 60 yards, so i dont care about bullet drop.

some people drive gas trucks, some prefer diesels... same difference.