I don't think leaving the Mags full will help (nor hurt) anything. If the follower is "sticky" in any way. it must be remedied. Empty the ammo from the mag. Take a long pencil and press (eraser end) on the mag follower. It should ride on the magazine walls silky smooth. If there is any grittiness, it must be cleaned or polished. I've had to disassemble and sand (600-800 grit) interior magazine walls and/or followers before to fix "sticky" mags.