Not sure what the issue here is. I might be playing a different game but I killed 15 zombies with 17 shots this morning, range between 10-80m, and the extra shots were misses rather than not enough damage to take down. You just gotta stop shooting shit in the foot. (In my experience) any shot to the chest or higher will take down a Z, even the amphibiaS (weakest gun in game?). Dunno about PVP cos I don't hang on the coast with all the CoD children, but from what some others are saying it sounds more like you need to work on your aim than any problem with the gun. Are you shooting into their can-filled vest and ruining food instead of injuring them? Aim for the neck, no helmet, no armor, no items absorbing the damage, no problem with .22 rounds. Just my 2c.