I had a Model 29 S&W in .44 Magnum with a 6.25" barrel. I bought it to use for deer in Illinois when they first allowed handgun hunting. Those hunts were only allowed in January then and the first season was exceptionally cold with lots of snow and ice. I took it to the range one morning to sight-in just before the season but it was so cold that I got as close to the range office as possible. I was the only person there, so it was safe enough.
I put in plugs and also some decent muffs. I fired the revolver 4 times and it was right where it needed to be. That was enough, so I took off the muffs and removed the plugs. It was still just as quiet as it was with them on. I had no hearing. I immediately knew my mistake. I'd been next to a steel sided building that did not allow any of the impulses from the muzzle of that very loud gun to escape.
It was at least 2 days before some hearing returned and that was after spending my time in a very silent place trying to allow the jangled nerves in my ears to return to some sort of normalcy. My hearing has never been the same. I have tinnitus (crickets, ringing, etc.) that never goes away. From that day, my hearing was damaged and there is no way to repair it. As I age, it becomes worse.
When I shoot at the range now, I wear good plugs and good muffs and I don't shoot close to buildings.
I only recount this story to illustrate how one foolish incident changed my hearing for the rest of my life, in the hopes that others will not do something equally foolish.
Oh, and I did sell that Model 29!
Thanks,
Clark