Just recently bought a .357sig barrel to drop in my Glock 27. I am using my stock G27 mags and a couple of G23 mags too. The thing runs great converted to .357sig, but one thing bugs me. The magazines rattle now with the .357's inside. Both the 27and 23 magazines. If this .357 conversion proves reliable after another 200 rounds I intend to leave it in this mode for nightstand duty and occasional carry. A noticeable rattle is not desirable. This gun, when loaded with stock .40sw rounds does not rattle nor does it rattle when converted to 9mm with 9mm mags and a LW barrel. Do regular stock .357sig Glocks rattle when loaded? Do I need .357sig mags? Just curious. Thanks.