Maybe the OP should ask the question - Has anyone's 1911 gone off accidentally while in the cocked & locked position and, if so, how?
I have searched the web for data bases of accidental discharges (AD’s), and have not found them.
(I found one on a Navy page, with M92's, but lost the link. There were a lot of AD's.)
I have read and “heard of” incidences of AD’s with M1911's.
Yes, there were AD’s with series 70’s type M1911’s with rounds in the chamber. It did not matter whether the pistol was cocked and locked, all that mattered was that there was a round in the chamber and the pistol was dropped far enough, in the right direction, for the firing pin to tap the primer. That is why Kimber, Colt, all have these firing pin blocks. Heck my P-38 has a firing pin block, so the Germans must have heard about this and designed that out.
As far as cocked and locked, I read one in American Handgunner. Cop goes into rest room stall in police station and hangs his “cocked and locked” M1911 on the coat hook. Somewhere, sometime the locked part of this equation becomes unlocked. As he reaches to lift his pistol off , the trigger bumps the coat hook. It fires. The recoil moves the M1911 back and forward, bumping the trigger on the coat hook with each discharge, until his M1911 is empty.
The problem is not mechanically cocked and locked, it is when the user thinks it is cocked and locked, but the safety is off. Some M1911’s have a stiff safety. Others have these extended safeties, ( Swenson types are on both sides) with the extra leverage and a rounded safety cam that are easy to disengage.
After that, all it takes is 3.5 pounds on the trigger.