Originally Posted by BullseyePrecision
If those thousand people jumped off a cliff would it be right? People are mis informed everyday.
Yes, people are misinformed everyday - but Olympus' point was that if thousands upon thousands of people practice something that was actually harmful to their firearm then there would be thousands of damages done that would require thousands of repairs. Then, everyone would learn the practice was harmful and not to repeat the harmful activity (just exactly like, in your analogy, those folks "jumping of a cliff" would learn that the ones before them perished and thus not to repeat that behavior).
If the guy at the gunstore said that pulling back on the slide to cock the hammer was not harmful yet thumb cocking the same hammer was somehow harmful, I would love to hear his explaination of how one was and one was not harmful when both actions mechanically perform the exact identical task.
The firing of a live round and the very rapid motion of the slide to cock the hammer (compared to either of these two methods above - thumb cocking or by hand manually racking the slide back to cock) is a far, far more violent action to perform the same task. But the firearm is designed to withstand that so either of the ways above (by hand) would logically do nothing harmful.