When I have been at the range or shooting for my CCW and the three times I have renewed my CCW, I have seen more 1911 pistols jam than any other type!
Well, there are so many variables one just can't conclude anything from simple and casual anecdotal observations. For example - Are 1911 owners more prone to be reloaders and using reloaded ammo? Ammo is a factor in the large, large majority of malfunctions.
Or, modification of the pistol. 1911s can be modified and are more prone to tampering than other makes. If you want to replace a worn Sig 220 spring, you get one spring weight choice. Replace a 5" 1911? People will use springs of all sorts of weights from heavy to light, from what, a dozen different companies?
Same with magazines. Glock owners generally use Glock mags. Colt owners can use <insert one of 2 dozen brand> mags.
I've seen every brand of pistol malfunction. I can't make blanket conclusions about anything from it other than - mechanical things fail, so practice malfunction drills. I have guns that work. I don't claim any of them are perfect and have never failed. Anyone who thinks differently hasn't shot enough ammo to experience a bad round. But, they work. I still expect they might not, and instead of brag about their performance, I practice the drill over, and over, and over.
Factory premium ammo fails. The most reliable gun in the world won't cycle a bad round. During the Justice Department's selection of a new pistol for the INS a few years ago, a fellow team member, an engineer, served on the testing and review board for the selection. Part of it entailed ammo submissions for 40 S&W. Of the batches submitted by the companies for evaluation, significant statistical testing procedures were followed, in accordance with the RFP. The companies had them, and they knew the criteria. You failed testing, you were dropped from consideration of the contract award.
Even with that criteria, every ammo submission failed. Out of spec and faulty ammo caused EACH company to have to resubmit. They didn't even have ONE brand that passed. Even on second submission, the big name companies had ammo not fire. Specs permitted a ceiling for failures in the testing. Every brand had failures, some moreso than others.
He concluded two things -
Factory ammo isn't as reliable as we all believe it to be.
Practice malfunction drills.
If you shoot enough, the odds and statistics will catch up with you and you'll get one that won't fire, too.