There are almost always going to be manufacturer tolerance variables with 1911 pistols and magazines in both 9mm and .45 ACP in my experience.
I own several 9mm and .45 caliber 1911 pistols from Ed Brown, Dan Wesson, Wilson Combat, Springfield, Colt, and S&W.
I use Wilson Combat, Ed Brown, CMC, Dawson Precision, and Tripp magazines. I have some 1911's that almost any of the mags will work in, and some that only one or two brands of mags will perform reliably in them. It's called tolerance stacking
Bottom line: Try some different magazines in YOUR pistol before buying a bunch of mags. Find a brand that works reliably, and then make your bulk purchase.