Posted here awhile ago about trouble with feeding - stovepiping, stuck empties, etc. Did the magazine service but still had some problems but not as many - so I went and bought a new Ruger magazine from the dealer - I checked the tension of the rotor - and my gosh was it stiffer than the original factory magazine ever was even after I performed the service (4 flats past the slack - which made it stiffer than when it was delivered) - so off to the range and not one jam with Stinger or Federal high velocity - I retentioned the original magazine to seven flats (after the spring slack takeup)and now it compares closer to the new magazine - now I need to test it at the range - but the point of all this is that Ruger should demonstrate alot more quality control on their magazines - when 10/22's first came out in the 60's you couldn't make one jam.