Where you find that moron, who will craft 14mm ammo for 1 metal and 5 adv. gunpowders when he'd better craft .223 ammo for same 1 metal and 5 adv. gunpowerds +.. 1 junk. And... of couse needler ammo, which is used only for selling.
1) .223 require good metal part, not regular, to craft.
OR
2) 14mm and cartriges require less gunpowder.
1st way is better.