I had the chance to take a .32ACP Welrod MkII out to the range for a bit of shooting. These use a combination of baffles and rubber wipes, and the suppressor's effectiveness quickly drops from "fantastic" to merely "very good" after a few shots put a hole in the front wipe. This example already had 2 or 3 rounds through it when I started shooting, and the sound changed from a muffled thump to a more gunshot-like crack over the course of the 8 or so rounds I fired. In practice, this was really not a problem - the Welrod was an assassination tool and not something intended for use in any sort of real gunfight.