There have been reports of 1911s being prone to jamming since I got my first one around 1970. I guess I have owned maybe 30 in all since then.
The only problem I have ever had was with a Colt series 70 in which I somehow bulged the barrel. I still don’t know how I did that. It did not effect the gun’s performance one bit but of course I replaced the barrel.
I can’t recall a single malfunction otherwise. I did get some Argentine surplus ammo which was bright and clean but would only fire about one out of three times.
I had a 79’s vintage Commander that stovepiped alot. Can’t say any of my “modern” 1911’s have had a problem (of course they weren’t Colts).
RE: the Argentine stuff, there was some Argentine surplus .308 that made it’s way on the market quite some time back that was insanely mis-loaded. I read some anecdotal instance of it blowing apart some guys new M1A, the pressures were in the 120-140 thousand psi range.
I wonder if they had some really bad streak of QA/QC?