The only magazines that function 100% in my DAR22 are the stock 10 rounders. BC steel lips were ok about 75-80% of the time. The BX-## functions flawlessly if I load 20 rounds, but I always get a failure after 5-10 rounds if I load it with the full 25 rounds. I had an aluminum TI mag, that I never managed to adjust correctly (and once they are adjusted they only work in that one rifle, so they are useless if you own multiple 10-22 based firearms). I plan to try the HC3R next.