My procedure, when inspecting arms is to check half cock (pull trigger), pull back to and check full cock, then release (gently) back to half cock and check again (pull trigger). I then check the imprint in the underside of the hammer for an obvious "moon" imprint (see: the whole cap splitting thing)... I have seen some people who slam the **** out of the hammer and have broken tumblers in the process. Their really is no need for that sort of activity if the inspection is done properly. Just my opinions though.
Comp E, 28th NY