With respect to the original question Mr. Sample's answer works for me,
I can see no reason for doing this to a 1911. It is either ready to rock and roll or it's empty with no magazine in it and an empty chamber with the hammer down.
With regard to faith in decockers:
Got absolute faith in those decock contraptions, do ya?
Tuner I don't have absolute faith in anything other than there is a God, and my Mom loves me unconditionally. Everything else is degrees of faith.
That said, my degree of faith in my Sigs' decockers is very high, knowing how the thing works. However, the possibility of a problem exists, and any decocking is done with the weapon pointed in a safe direction; ie, down range, a clearing barrel, or at my vest hung over a chair. The same is true whenever manipulating the weapon for loading and unloading. Doesn't cost me anything to do it that way, other than a few extra seconds to be sure I'm doing it safe.
I can explain to my boss why I ruined a panel on my body armor, or we need to replace the clearing barrel, and I won't be in any trouble. However, forget trouble, I couldn't live with myself if a ND resulted in someone being injured or killed, whether it's decocking my Sig or loading up my 1911.
The procedures you outlined from your military days is great, but in answer to your question about how many rounds that barrel took each month I'm guessing it was some number greater than zero. People rush, take shortcuts, etc. and NDs result.
Stay safe folks. There are risks in life, and they can't be completely avoided, but loading/unloading and making your weapon safe to holster/carry is one area where the risks can be greatly minimized.