Which one would you guys prefer? what is the range on them?? I am wondering abotu the sabots for each not foster style

20 ga it's lighter and shoots just as far!!!!!!11

20ga will lay that buck down

Either will do the job. The 12gage's plus is a bigger chunk doing more damage. 20gage less recoil and likely more user friendly for most.

I have an NEF shooting system with both a 20 & 12 gauge slug barrel. I've shot the 12 gauge TWICE and put the barrel up. Recoil was just too much for me and I'm a big guy-6'3", 240 lbs.
And from EVERYTHING I've read, seen and experienced the 20 gauge is more than enough gun to put down a big whitetail.
My little 20 gauge NEF rifled bull barrel is really accurate out to 125 yards! No brag, just fact.

With the new ammo on the market if I were looking for a dedicated slug gun right now it would be a 20 gauge. They use simular loads as inline muzzle loaders, same bullets for the most part, same speeds and simular twist rates in the barrels. This would lend me to believe the performance and accuracy would be on par with the average inline ML, which is pretty good. And they will have plenty of down range power to take deer, especially with the better bullet designs.

Now if your looking for a gun with more versatility like a pump gun or auto with interchangable barrels you might want to look at a 12 ga. If you decide on a H&R Ultra get the 20 ga, because you can get different barrels for it in 20, 12 and centerfire. If you get the 12 ga the only thing you can swap onto is a 10 ga smooth bore, they use different frames. I own the 12 ga ultra, if I had it to do over again it would be 20 ga. However I got a pretty decent deal on the one I have. In all honesty I wish I would have saved up the money and got a savage slug gun instead. Oh well.

Paul

Last year I put a scope on my 12 ga. to shoot slugs. Went to sight it in with 3" mags and after about 10 shots I just couldn't take it anymore. Go with the 20 ga. You'll ge tthe same distance but much less recoil.

if you are hunting from a stand get the 20 if you are drive hunting and most of your shots are running deer get the 12 it works better i have found more knock down power just my opinon

A 20ga sabot slug from a rifled barrel has more energy at 100 yds than a traditional foster slug from a 12 ga smoothbore, and a much flatter trajectory.
For a dedicated slug gun, I would probably go with a 20ga.
I have a benelli nova which I bought as a combo. Being that I wanted the 12ga for pheasant, I have the 12ga rifled cantilever for whitetail.
My 13yo son's 20ga 870 dropped his first whitetail during youth season in september and will likely last him a long time. He can drill a 1/2 gallon milk carton at 100 yds...no deer can survive that.