If you have a backpack with at least 10 empty slots, you can solve your problem simply stocking the Einfield on it (10 slots per secondary weapons plus 1 slot per ammo). Also, I would not start shooting zombies with a rifle, the noise will attract a lot more, and well, with lucky you will be doomed in a few minutes. About your last question, the zombies will only spawn in the 'right' places. They do NOT spawn on the forest, for example. According to Marknetic up there, there is a maximum number of 30 zombies that can spawn per player, but that will only happen if the player are on a spawnable place. I am not sure if I got a point here. Suppose that you are entering a city that have two players inside, they are on spawnable places and they are also walking/running through the city. I guess it will spawn a max of 60 zombies plus the ones you will make spawn when you get closer. So you can easily run into a large groups of zombies. Take care. On servers with more players you will be obviously more vulnerable to other players and larger groups of zombies. BUT, you can think that is good, because with some experience and patience you can kill and loot players, or trap them all as well. But if you are learning yet, I will definitely recommend servers with less population. :D