Does it make a difference in the size of the bullet/gun you use? I know the P90 is the choice among 99% of the people who play in the zombie servers. I know it shoots the most bullets per minute. But wouldnt a larger bullet be more beneficial and do more damage and have more knock back power? I do not have access to the weapons right now but doesn't the m4 have a larger bullet than the p90? What about the TMP? This is for ZOMBIE MOD, unlimited ammo, so NO RELOAD required. This would be best used in a cade built or an area holding off single handedly or with another person. or in a tube alone for most occasions. Usually never in the open running like an idiot getting his head cut off.