I have a 1960's K-22, 6 1/2 inch, pinned and recessed. I bought it a year or two ago and haven't had the time to figure out what the problem is. Ever since I've had it, it shoots all over the place (mostly on paper at 50ft with an NRA 50ft pistol target) with several keyholes. I've tried several different types/brands of ammo as well as the original thorough cleaning it got when first purchased. The gun is in very good shape or it would have gone right back to the shop. Just so you know it's not me, I can keep them all in the black with my basic Ruger MKII with fixed sights and a shorter barrel.
Is it possible to "shoot out" a .22 rimfire built on a K frame? As .22's go it seems pretty overbuilt.