Well, my thinking was to use it as a reload. Use the standard Mag that came with the gun as the one loaded while carrying, and keep the 30rd inside the waste band on a pouch so that if my luck goes so far south I actually need to not only use the gun but to reload, that would be what I'd change too.

Question, when you say won't be reliable, do you mean won't be reliable and will cause the gun to malfunction/fail, or just won't be reliable in that you won't be able to hide a gun with a 30rd mag in it? It's a serious question, not intended to be sarcastic or anything like that. I'm asking cause I've never heard that particular complaint about them before now.