In the late seventies I purchased a used S+W model 17 that was about 10 yrs old and looked like new on the outside. I had pretty severe extraction problems with LR ammo and opon examination I could see rings in each of the chambers about half way down. No matter what kind of solvent I used I could not get them to come out. The empty case sticking was so bad I sent the gun back to S+W to see if the rings could be polished out. I got a call from the repair department and they told me that the rings were caused from firing shorts. Also if the rings were polished out the chambers would be just out of spec, so to make it right they recommended a new cylinder be fitted. The question is not if shorts can eventually damage a chamber because they can. The question is how many shorts does it take before you start seeing damage. I will tell you what I am not about to find out because I will not use them in any of my guns. If I have to use some sort of low powered ammo it will have the long case.