Are you aware of that mag holster comes in a dual mag set up? I carry a Glock 23 with the 15rd G22 mag or 13rd mag depending on my clothing, and will carry 2 G22 15rd mags with XGrips on the left side. If I can't Git'R Done with 44 rounds then I guess I just couldn't Git'R Done. I used to always think 13rd is sufficient and never carried extra mags.
Well, now since the Aurora Theater shooting and the Mall Shooting...