Ammunition for most weapons (shotguns, sniper rifles etc.) seems to be limited to 100 rounds. Picking up additional ones doesn't increase the counter. Please
1) either increase the ammount of ammunition we can hold (100 is quite litte for long firefights with a shotgun), or
2) don't let the player pick up ammo when their ammo counter for that weapon is already full. Otherwise, we're wasting ammo locations without getting any ammo.