I shot a Colt .357 similar to that this past weekend, seems like the barrel was shorter. Damn loud piece of iron. We had been shooting a variety of shotguns and .22's with earplugs without any issues. The first shot from the Colt with the same earplugs and my right ear went "blank" for about an hour.

Introduced my 9 year old son to my Armalite AR7 .22 survival rifle and an M4 .22 as well. Let's just say there were no turtles in that pond that were safe from at least being really annoyed by him. Turns out he is a pretty good shot.