When I first started playing DayZ, I frequently took a look at the map, found at http://dayzdb.com/map Now, a couple of weeks later I know the "best" loot spawns by heart, so it is not needed anymore.
The Bison is great at killing Zombies and players that haven't spotted you yet. It may take a little while until they die, but they will have no idea from where they are being shot. The FN FAL is much much stronger than the Bison and can kill a player in 1 or 2 shots, making it far more lethal, but also more audible.