It’s apparently 1911 day today. Ladies and gents, don’t buy crappy magazines for competition or personal defense guns. I could write another 700 or 800 words just on that, but bottom line the majority of malfunctions in modern semi-automatic pistols are caused by the magazine. Get good magazines.
You can also buy crappy magazines, because everyone should practice malfunction clearance drills, but if you shoot a “public domain” platform like an AR15 or 1911, buy good quality magazines for serious work. I can’t tell you how many malfs I’ve seen at matches in 1911 that are 100% the fault of the gun-show special mags and were eliminated when the shooter switched to Chip McCormick/Metalform/Wilson Combat magazines.
Oh, and to answer your question – I use Chip McCormick mags exclusively in my 1911s chambered for .45 ACP.