RE: 20ga vs 12ga for slug gun
I have used a 12 ga Mossberg 500 pump with camo stock and shot slugs for many years. They put a hole in whatever they hit about the size of a quarter. My first buck I hit at 70 yards, through the neck and out the leg from a tree stand. I was aiming towards the deer' s front and hit a little left of where I was aiming but the deer went down just the same. They kick isn' t too bad when you shoot 1 or 2 slugs. At the range when you shoot more, I do get slightly brused but don' t really care since it is fun shooting it. I also put a scope on it last year for some more fun.
Good luck....
Tom