I have both USH's 12 & 20.... Both are extremely acurate, but if your not going to hunt anything bigger than a black bear, than i would say, stick with the 20... I shot a 300lb. Black bear with my 20ga. and it flipped it 180 degrees and dead in a matter of seconds, so it's more than capable with whitetails. It's the same size bullet that comes out most .50 cal. muzzleloaders!

Your going to have to play with your loads a bit to find the ballistics to match the recticle crosshairs. I believe the slugs hunters scope recticle is set for slugs traveling 1900 f.p.s.

NikonProstaff is also a good scope for the price!!!!!!!!!!