Adding some feedback/reports:
1. items_ammo_guns.txt - the class for buckshot should be CLASS:BUCKSHOT instead of CLASS:BULLET_S
2. reactions_guns.txt - for any metal gunstones, cartridges, and sawn-off shotgun reaction, I think there's no need for the METAL tag before GET_MATERIAL_FROM_REAGENT. The errorlog says
Unrecognized Inorganic Token: GET_MATERIAL_FROM_REAGENT before, removing it should fix it.
The fixed reactions:
[REACTION:ANY_BULLET_L]
[NAME:make large gunstones (any metal)]
[BUILDING:BULLET_MINT:NONE]
[BUILDING:BULLET_MAGMA:NONE]
[REAGENT:A:150:BAR:NONE:INORGANIC:NONE][REACTION_CLASS:METAL]
[PRODUCT:100:60:AMMO:ITEM_AMMO_BULLET_L:GET_MATERIAL_FROM_REAGENT:A:NONE]
[FUEL]
[SKILL:METALCRAFT]
[REACTION:ANY_BULLET_S]
[NAME:make small gunstones (any metal)]
[BUILDING:BULLET_MINT:NONE]
[BUILDING:BULLET_MAGMA:NONE]
[REAGENT:A:150:BAR:NONE:INORGANIC:NONE][REACTION_CLASS:METAL]
[PRODUCT:100:60:AMMO:ITEM_AMMO_BULLET_S:GET_MATERIAL_FROM_REAGENT:A:NONE]
[FUEL]
[SKILL:METALCRAFT]
[REACTION:CARTRIDGES_L]
[NAME:prepare large cartridges]
[BUILDING:WORK_BENCH:NONE]
[ADVENTURE_MODE_ENABLED]
[REAGENT:A:60:AMMO:ITEM_AMMO_BULLET_L:NONE:NONE]
[REAGENT:B:150:POWDER_MISC:NONE:INORGANIC:GUNPOWDER]
[REAGENT:C:1:BOX:NONE:NONE:NONE][BAG][CONTAINS:powder][PRESERVE_REAGENT]
[REAGENT:D:1000:CLOTH:NONE:NONE:NONE][ANY_PLANT_MATERIAL]
[PRODUCT:100:60:AMMO:ITEM_AMMO_CARTRIDGE_L:GET_MATERIAL_FROM_REAGENT:A:NONE]
[SKILL:CLOTHESMAKING]
[ADVENTURE_MODE_ENABLED]
[REACTION:CARTRIDGES_S]
[NAME:prepare small cartridges]
[BUILDING:WORK_BENCH:NONE]
[ADVENTURE_MODE_ENABLED]
[REAGENT:A:60:AMMO:ITEM_AMMO_BULLET_S:NONE:NONE]
[REAGENT:B:150:POWDER_MISC:NONE:INORGANIC:GUNPOWDER]
[REAGENT:C:1:BOX:NONE:NONE:NONE][BAG][CONTAINS:powder][PRESERVE_REAGENT]
[REAGENT:D:1000:CLOTH:NONE:NONE:NONE][ANY_PLANT_MATERIAL]
[PRODUCT:100:60:AMMO:ITEM_AMMO_CARTRIDGE_S:GET_MATERIAL_FROM_REAGENT:A:NONE]
[SKILL:CLOTHESMAKING]
[ADVENTURE_MODE_ENABLED]
[REACTION:CARTRIDGES_B]
[NAME:prepare buckshot cartridges]
[BUILDING:WORK_BENCH:NONE]
[ADVENTURE_MODE_ENABLED]
[REAGENT:A:180:AMMO:ITEM_AMMO_BULLET_S:NONE:NONE]
[REAGENT:B:150:POWDER_MISC:NONE:INORGANIC:GUNPOWDER]
[REAGENT:C:1:BOX:NONE:NONE:NONE][BAG][CONTAINS:powder][PRESERVE_REAGENT]
[REAGENT:D:2000:CLOTH:NONE:NONE:NONE][ANY_PLANT_MATERIAL]
[PRODUCT:100:30:AMMO:ITEM_AMMO_BUCKSHOT:GET_MATERIAL_FROM_REAGENT:A:NONE]
[SKILL:CLOTHESMAKING]
[ADVENTURE_MODE_ENABLED]
[REACTION:ARMED_BLAG]
[NAME:saw off shotgun]
[BUILDING:GUN_FORGE:NONE]
[BUILDING:GUN_MAGMA:NONE]
[REAGENT:A:1:WEAPON:ITEM_WEAPON_SHOTGUN:METAL:NONE]
[PRODUCT:95:1:WEAPON:ITEM_WEAPON_SHOTGUN_SAWN_OFF:GET_MATERIAL_FROM_REAGENT:A]
[SKILL:FORGE_WEAPON]
[ADVENTURE_MODE_ENABLED]
Oh, and I should say, great mod! The goblins will love their new shotguns.