They say the 1911 is finicky, unreliable, and junk.
I own a number of M1911's chambered in a number of different cartridges (45 ACP, 40 S&W, 357 Sig, 38/45 Clerke, 38 Super, 9x19, 38 Special Wadcutters). Of the 45 ACP versions, including several that I built, most have been trouble free when using 230 grain FMJ ammunition. But hey, that is what the gun was designed for. I do run into functioning issues when trying to shoot some of the various self defense bullets on the market today. Also, I've had trouble getting the guns to work with 185 or 200 grain target semi-wadcutters except in my Gold Cup.
The only 45 ACP M1911 that I had problems with out of the box is an Auto Ordinance M1911. A little TLC made it 100% reliable with 230 FMJ ammunition. But, note, if you work on an M1911 without some good knowledge, you can make it more unreliable.
I have two M1911's chambered in 38/45 Clerke. They get a bit finicky at times but it usually can be traced to the magazine. There are several configurations of the magazine lips and followers and the bottle necked 38/45 Clerke cartridge has a preference.
I have a 1950's vintage Colt M1911 chambered in 38 Super. With an old "headspace on the rim" barrel, it would shoot 158 grain 38 caliber wadcutter loads with 100% reliability. Neat rounds, very accurate and the cases would drop in a pile just a couple feet from me. Recently, I installed a 38 Special wadcutter barrel in this gun and have been dabbling with cartridge. It is not as reliable as with the 38 Super barrels.
The M1911 design is over 100 years years old and it is still a mainstream design. Not many other pistol designs can claim that longevity.