The ammo availability is a big deal. My 10/22 mag likes the heavier type bullets CCI, Winchester etc they all shoot around 1/2" at 100 yards, but it does not do so well with the 33 grain type bullets, it will still hold around 1" at 100 yards, but I just never seen the lighter bullets being better for my use. Where I have problems is buying a box of 50 22 wmr if it's not the same brand as you were shooting you will need to sight back in. Even if it's the same brand I still have to confirm sight in, this is a custom rifle/barrel the added accuracy can be a bit of a pain in a way because the need to do the above, but it sure is nice when I need to pop a crow, groundhog, coyote or bobcat most of the time the varmints are not concerned with my presence the combo of 10/22 magnum 1/2" accuracy and a Weaver 3-9 rimfire scope has been outstanding !!