+1 for the McCormick Power Mags: I run them exclusively in my 1911's these days. Believe it or not, I track my FTF's by magazine, and I've yet to ever have a SINGLE failure of any kind--in over 5K total rounds fired--with a CMC magazine (I used 4 total CMC mags for those 5K rounds). They also have some new "Power Mag +" mags that are a bit more expensive, and allegedly have been improved even more, but you'd have to call CMC Tactical to find out exactly HOW the "plus" mags were improved.

