Not a bad range on that scope. 50mm will ensure good light, even up close on an evening shoot.
If you are shooting at 12ftlb, your max range is going to be 60 yards, head shots only. Once you have set the scope, 2 inches from your eye at rest, bench rest the gun and using 3 targets, 1 at 20 yards, 1 at 30-35 yards, and the other at 45-50 yards. Set the parallax view on the middle one. So that the reticule and the target are both in sharp focus, this is done at the scopes lowest setting of 6. Even at 50-60 yards, you won't be going above 8 on the scopes zoom. Zero the scope horizontal