Thats easy, the Atkins acelerator stock , the one that made the 10/22 fire like a machinegun (the one banned by the BATFE after they said it was ok) did testing on the best mags in order of reliability 1. Ruger 10 shot mags, 2.tactical sloutions aluminuim and polymer magazines 3. Steel lips.
Tactical soloutions mags are the best after market mags for they have adjustable lips for perfecting the feeding for YOUR rifle and they can be taken apart for cleaning and spring replacement for longevity.
Rifleman 336