I must be strange, because I detest 10/22 rotary mags... guaranteed to deform bullets on feedramp, every mag has its own integral ramp. They require constant cleaning and spring tuning maintenance to keep running after only a few thousand rounds. You can load them with the maglula tool and it will put a dent in every case. For the speed shooting games they're fine--the 10/22s need constant maintenance too--but for a precision rimfire, single stack stick mags that allow the bullet to leave the mag without deforming the nose seem preferable.