Well I finally managed to get my hands on one of these and it doesn't work !! Has anybody had any problems with these ? Are they crap ? I couldn't load more than 20 rounds of standard CCI .22lr and after firing about ten of them it stopped feeding with half the rounds jammed down inside the body of the magazine. I had to whack it on the base to get the rounds to come up ! I suspect the plastic follower is jamming due to being manufactured rough ? Can these things be dismantled so I can "polish" the plastic follower ? Any suggestions truly welcome. Thanks.