I have two slug guns, a 12 gauge TC Encore and an 20 gauge H&R. I would heavily suggest the 20 gauge, I get better accuracy and better trajectory when shooting my 20-gauge saboted lightfields. Plus the recoil is very manageable. I see no need to go witht he 12 gauge, I have taken multiple deer past 80 yards with my 20. I took one buck at 125 yards, I hit it twice with the bullets less than 3 inches appart.

Also my 20 gauge H&R is actually a 12 gauge which has been bored down to 20, it is an extremely accurate shotgun. It is also cheap (<150). I would match it up agains ANY other shotgun out there in terms of accuracy. I like my Encore, don't get me wrong, it is a pretty gun, but all things being equal the H&R is a better gun.

I am sure that if you post a questionabout H&R guns you will here pretty much the same stuff I am telling you in referrence to how good they are even though they are cheap! I just love that gun.