Howdy, The Contender 22 mag factory bull barrel (10") that I own is a 3/4" @ 50 Yard gun with CCI maxi mags. It doesn't want to shoot as well with the premium ammo on the market. Another barrel may be different. I also have a Contender SS 22 match 10" barrel that will shoot one ragged hole at 25 yards with the now defunct CCI small game bullets. Both barrels sport a Burris 2 1/2-7 pistol scope with PA. The 22 LR barrel is the first pistol I have been able to kill my limit of squirrel in a single morning.
I have also popped a couple crows with the 22 mag barrel @ 78 & 105 yards. The Contender RF barrels seem to be a bit more accurate that other factory barrels. I have a couple Bullberry CF barrels that shoot quite well also. Good shooting!