My new G27 has had many many Failure to feeds, but only when my Girlfriend is shooting it. I'm using G22 15rd LE mags that I bought used. Four other people have shot this gun, same mags, same ammo, without a single failure of any kind. Is this classic "limp-wristing"? Would weak mag springs create a higher chance of this if someone was "limp-wristing"? She doesn't like my new Glock at all, but would if it worked for her. any Thoughts?