The magazine is not a minor part. its key. And a large part of the problem may not be solely the magazine but rather the Colt you are using.
When a 1911 is set up correctly it will feed anything. I've got several, and not only will they feed 230 ball, they'll feed 200 semi wadcutters, 200 gold dots, 185 silvertips and everything else. For that matter, I can pick up a handful of fired cases, stick 'em in the magazine and hand cycle the slide. They will reliably feed an empty case. This is with Chip McCormick shooting star mags, kimber mags and wilson mags. Reliability using ammo and a decent magazine in a decent gun is 100%.
For that matter I just sold a 1944 vintage 98% Remington Rand 1911a1. With any of the above magazines it too would feed and fire everything including 230 ball, 200 swc cast, 230 JHP and 185 silvertips. Failures? zero.
I suspect a large part of the 1911's reputation for 'unreliablity" (if thats a word) stems from some cheap bastard buying a 27 year old crapped out magazine in a gun store used parts bin.