With the addition of coal to "Yellow" ammo, this now makes it impossible to manufacture in space until coal synthesis - rocket turret tech.
How about adding a second recipe for Firearm Magazine that uses carbon instead of coal, locked behind either space platform or space science pack techs. This will allow the initial space ships to stay in orbit around the planets ( Vulc, Gleba, and Folg ) as basic ammo will be craftable in space using just the initial asteroid recipes