So I was at Sportsman's (or whatever they call it this week) and asked to look at a Beretta 92fs. The gentleman handed it to me after clearing it (have to say I have dealt with him in the past and he is a very nice guy, older retired military is my guess), anyway he handed it to me with the chamber open and once I received it I dropped the mag, looked and replaced it (a good habit I think) and released the slide with the slide release. I let it go back into battery freely, and he jumped and said that you shouldn't do that on an empty chamber. He showed me how you should hold the slide and ease it back. I was a little annoyed, as I am not new to firearms, but out of respect I let him show me the way, and said nothing. After all, he is an old timer who might know something I don't. On top of that, you don't disrespect your elders, even if you think they might be wrong. Anyway, the thing is I do this (releasing the slide freely) when I practice dry firing all the time. Am I doing something that could harm my pistols in the long run? I didn't think so, but I am not an expert. Should I be holding the slide and controlling the release? I don't see how letting it fall back naturally would harm anything, but I am open to opinions.