I shot multiple zombies myself with it, and reloaded often with no problems.

Dropped my sawed off shotgun, encouraging a clan member to pick up andtest recoil, but they weren't able to shoot it. I traded it to two different clan mates and both weren't able to shoot. I had one of my clan mates even try unloading it, dropping it, and reloading it in different orders. They were still unable to shoot the sawed off shotgun (Did not test with full length shotgun).