The obvious downside to firearms is ammunition, often seen as more rare than the guns themselves. Ammunition can be found in the same kinds of places as weapons in the form of Ammo Tins, lower grade ammunition is found in civilian areas where the good stuff is only available in military areas and survivor stashes on rooftops.
Ammunition comes in different types, which correspond to different weapons, some ammo types work in multiple weapons and can be swapped between them with the "Transfer Ammo" option in containers.
Most standard firearms fit one magazine in the weapon and one reserve.
|Name||Calibre||Bleedrate Mult||Knockout Chance Mult||Penetration Mult||Rounds|
|9mm - Hollow Point||calibre_9mm||1.0||1.0||0.2||20|
|50 - Action Express||calibre_50cae||1.0||1.5||0.9||28|
|Buck - No. 1||calibre_12g||1.1||1.8||0.5||24|
|556 - FMJ||calibre_556||1.1||1.2||0.8||30|
|357 - FMJ||calibre_357||1.2||1.1||0.9||10|
|Rocket - RPG||calibre_rpg||1.0||1.0||2.0||1|
|GasCan - Petrol||calibre_fuel||0.0||0.0||0.0||20|
|9mmFMJ - FMJ||calibre_9mm||1.2||0.5||0.8||20|
|Flechette - Flechette||calibre_12g||1.6||0.6||0.2||8|
|HomeBuck - Improvised||calibre_12g||1.6||0.4||0.3||14|
|556Tracer - Tracer||calibre_556||0.9||1.1||0.5||30|
|556HP - Hollow Point||calibre_556||1.3||1.6||0.4||30|
|357Tracer - Tracer||calibre_357||0.9||1.1||0.6||10|
|762 - FMJ||calibre_762||1.3||1.1||0.9||30|
|50BMG - BMG||calibre_50bmg||2.0||2.0||1.0||16|
|308 - FMJ||calibre_308||1.2||1.1||0.8||10|
Generally, hollow point rounds are better against non-armoured targets and full metal jacket rounds will penetrate armour. Tracer rounds have no additional properties other than lighting up their flight path and possibly igniting explosive materials.
(Not all types are in the game yet)
Hollow Point - more knockout, moderate bleed, less effective against vehicles/occupants
Soft Point - less knockout than above, faster bleed rate, less effective against vehicles/occupants
FMJ - armour piercing, shield piercing, more effective against vehicles/occupants
Tracer - lit bullet, chance to ignite fuel tanks
Explosive/incendiary - ignites fuel tanks, extra knockout chance and burn damage
Improvised - Common yet not as effective.
Civilian - Standard civilian legal ammunition, nothing fancy.
Military - Powerful and effective yet sparse.
Exotic - Highly illegal and not used by the military thus making it hard to find.