I find the best reliability comes from CCI Standard Velocity rounds, the worst from Remington. CCI's Pistol Match (Green Tag) is good quality, but pistol match loads are generally reduced power to cut down on recoil during timed and rapid fire. The longer barrel time means your follow-through has to be extra good shooting them, so I don't find they are any more accurate in my Rugers. They are a little easier on the gun itself, though. I haven't run any through my Marvel conversion and don't recall how they did in the K-22, or if I even tried them in that gun? In any event, it may be a moot question. Most .22's prefer one brand over another, sometimes for no apparent reason. Your best bet it to get single boxes of several brands of standard velocity loads and see what it shoots best. The subsonic hollow points do well most of the time in one of my guns, but seen to throw a flier in every box somewhere. Worth trying, though.