I've been pocket holster carrying my CM9 every day, almost all day. Today I took it to the range after carrying it for about a month, without inspecting it or cleaning it, or making sure that the cartridges were lined up right in the magazine. Pulling it out, I could see pocket lint stuck to it, especially in the trigger mechanism. Since it's summer, and it's been secreted in my pocket, exposed to sweat and the elements, I was pretty doubtful that it would chamber and fire after the first round.
Wouldn't you know it, it sent the whole magazine, and every one after that down range with perfect reliability.
Good to know! After all that jostling in my pocket, etc, every bullet went to battery like a champ.

Bonus - my buddy brought along 3 Colts: a 1911 10mm, a 1911 45, and an AR15. The 10mm has a 5 inch barrel, and I learned how much difference a little extra sight radius can make with accuracy.
Fun day at the range!