I'm sorry, but....WHAT??????
The ONLY reason to EVER pull a trigger, is to fire the weapon. NEVER, EVER, EVER pull a trigger to "verify" the gun is empty!!!! (Hint: as soon as you pull that trigger...that gun will now be empty).
There is one exception to the trigger pull rule - a requirement to release the slide for cleaning. And, that should be step four of that particular process - 1. drop the mag, and put it on a table in plain view while you take steps 2, 3, and 4. 2. rack the slide and eject anything that might be in the chamber. Place that round next to the mag, also in plain view. 3. lock the slide back to visually (with your EYES, not the TRIGGER) verify an empty chamber (use a finger if you don't trust your eyes), and 4. release the slide, and pull the trigger to detach the slide for disassembly.
And regardless of when you're pulling the trigger, or what condition you "think" the gun is in, follow The Rule: DON'T EVER POINT A GUN AT SOMETHING YOU DON'T WANT TO DESTROY.
To those pulling guns out of safes and nearly dry-firing them with rounds in the chamber? There's the Other Rule: TREAT EVERY GUN AS IT IF IS LOADED UNTIL YOU PERSONALLY VERIFY OTHERWISE. Step one when you pick up a gun (any gun)? Verify chamber status. Unless YOU were the one who put it there, and you KNOW FOR A FACT that nobody has touched it since (i.e. you're the only one with the safe combo, or it's been in your holster on your body the whole time), it is up to YOU to verify the chamber status. Not your buddy who says he checked. Not the Range Officer. YOU. Period. Just assume it's loaded, until you prove it to yourself. (again - VISUALLY, not by using the trigger).