diff --git a/data/json/items/ammo/40x46mm.json b/data/json/items/ammo/40x46mm.json
index 013fa5c7e214c..c7cb7860ab5b1 100644
--- a/data/json/items/ammo/40x46mm.json
+++ b/data/json/items/ammo/40x46mm.json
@@ -99,7 +99,7 @@
     "copy-from": "40x46mm_slug_m118",
     "type": "AMMO",
     "name": { "str": "40x46mm-M199 slug, reloaded" },
-    "description": "An improvised 40x46mm load resembling an oversized shotgun slug, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "description": "An improvised 40x46mm load resembling a shotgun slug, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
     "casing": "40x46mm_m199_casing"
   },
   {
@@ -118,5 +118,66 @@
     "name": { "str": "40x46mm-M199 flechette, reloaded" },
     "description": "An improvised 40x46mm flechette load containing 10 steel darts, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
     "casing": "40x46mm_m199_casing"
+  },
+  {
+    "id": "bp_40x46mm_buckshot_m118",
+    "copy-from": "bp_40x46mm_buckshot_m199",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M118 buckshot, black powder" },
+    "description": "An improvised 40x46mm buckshot load somewhat resembling M576, loaded into a M118 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "casing": "40x46mm_m118_casing"
+  },
+  {
+    "id": "bp_40x46mm_buckshot_m199",
+    "copy-from": "40x46mm_m576",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M199 buckshot, black powder" },
+    "description": "An improvised 40x46mm buckshot load somewhat resembling M576, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "proportional": {
+      "price": 0.3,
+      "damage": { "damage_type": "bullet", "amount": 0.76, "armor_penetration": 0.5 },
+      "recoil": 0.76,
+      "dispersion": 1.2
+    },
+    "extend": { "effects": [ "BLACKPOWDER", "MUZZLE_SMOKE" ] },
+    "delete": { "flags": [ "IRREPLACEABLE_CONSUMABLE" ] }
+  },
+  {
+    "id": "bp_40x46mm_slug_m118",
+    "copy-from": "40x46mm_grenade",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M118 slug, black powder" },
+    "description": "An improvised 40x46mm load resembling a shotgun slug, loaded into a M118 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "damage": { "damage_type": "bullet", "amount": 21, "armor_penetration": 1 },
+    "weight": "120 g",
+    "proportional": { "price": 0.3, "recoil": 0.76, "dispersion": 1.2 },
+    "casing": "40x46mm_m118_casing",
+    "extend": { "effects": [ "BLACKPOWDER", "MUZZLE_SMOKE" ] },
+    "delete": { "flags": [ "IRREPLACEABLE_CONSUMABLE" ] }
+  },
+  {
+    "id": "bp_40x46mm_slug_m199",
+    "copy-from": "bp_40x46mm_slug_m118",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M199 slug, black powder" },
+    "description": "An improvised 40x46mm load resembling an oversized shotgun slug, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "casing": "40x46mm_m199_casing"
+  },
+  {
+    "id": "bp_40x46mm_flechette_m118",
+    "copy-from": "bp_40x46mm_buckshot_m118",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M118 flechette, black powder" },
+    "description": "An improvised 40x46mm flechette load containing 10 steel darts, loaded into a M118 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "damage": { "damage_type": "bullet", "amount": 19, "armor_penetration": 3 },
+    "delete": { "effects": [ "NOGIB" ] }
+  },
+  {
+    "id": "bp_40x46mm_flechette_m199",
+    "copy-from": "bp_40x46mm_flechette_m118",
+    "type": "AMMO",
+    "name": { "str": "40x46mm-M199 flechette, black powder" },
+    "description": "An improvised 40x46mm flechette load containing 10 steel darts, loaded into a M199 canister.  Due to the limitations of weapons built to fire 40x46mm grenades, it's much less powerful than most people would expect.",
+    "casing": "40x46mm_m199_casing"
   }
 ]
diff --git a/data/json/items/ammo/40x53mm.json b/data/json/items/ammo/40x53mm.json
index 7620c71087d6f..a30226312f96d 100644
--- a/data/json/items/ammo/40x53mm.json
+++ b/data/json/items/ammo/40x53mm.json
@@ -40,8 +40,7 @@
     "type": "AMMO",
     "name": { "str": "40x53mm buckshot, reloaded" },
     "description": "An improvised 40x53mm buckshot load somewhat resembling M576.",
-    "damage": { "damage_type": "bullet", "amount": 141 },
-    "proportional": { "price": 0.7, "dispersion": 1.1 }
+    "damage": { "damage_type": "bullet", "amount": 141 }
   },
   {
     "id": "40x53mm_slug_m169",
@@ -58,7 +57,36 @@
     "type": "AMMO",
     "name": { "str": "40x53mm flechette, reloaded" },
     "description": "An improvised 40x53mm flechette load containing 115 steel darts, similar to M1001 flechette load.",
-    "range": 14,
     "proportional": { "price": 0.7, "damage": { "damage_type": "bullet", "amount": 0.9 }, "dispersion": 1.1 }
+  },
+  {
+    "id": "bp_40x53mm_buckshot_m169",
+    "copy-from": "bp_40x53mm_flechette_m169",
+    "type": "AMMO",
+    "name": { "str": "40x53mm buckshot, black powder" },
+    "description": "An improvised 40x53mm buckshot load somewhat resembling M576.",
+    "damage": { "damage_type": "bullet", "amount": 119 }
+  },
+  {
+    "id": "bp_40x53mm_slug_m169",
+    "copy-from": "40x53mm_grenade",
+    "type": "AMMO",
+    "name": { "str": "40x53mm slug, black powder" },
+    "description": "An improvised 40x53mm load resembling an oversized shotgun slug.",
+    "damage": { "damage_type": "bullet", "amount": 119, "armor_penetration": 3 },
+    "proportional": { "price": 0.3, "recoil": 0.76, "dispersion": 1.2 },
+    "extend": { "effects": [ "BLACKPOWDER", "MUZZLE_SMOKE" ] },
+    "delete": { "flags": [ "IRREPLACEABLE_CONSUMABLE" ] }
+  },
+  {
+    "id": "bp_40x53mm_flechette_m169",
+    "copy-from": "40x53mm_m1001",
+    "type": "AMMO",
+    "name": { "str": "40x53mm flechette, black powder" },
+    "description": "An improvised 40x53mm flechette load containing 115 steel darts, similar to M1001 flechette load.",
+    "damage": { "damage_type": "bullet", "amount": 114, "armor_penetration": 6 },
+    "proportional": { "price": 0.3, "recoil": 0.76, "dispersion": 1.2 },
+    "extend": { "effects": [ "BLACKPOWDER", "MUZZLE_SMOKE" ] },
+    "delete": { "flags": [ "IRREPLACEABLE_CONSUMABLE" ] }
   }
 ]
diff --git a/data/json/items/gun/40x46mm.json b/data/json/items/gun/40x46mm.json
index 18c12889da243..6541a91b85be8 100644
--- a/data/json/items/gun/40x46mm.json
+++ b/data/json/items/gun/40x46mm.json
@@ -17,6 +17,7 @@
     "ammo": [ "40x46mm" ],
     "dispersion": 550,
     "durability": 6,
+    "blackpowder_tolerance": 60,
     "clip_size": 1,
     "reload": 350,
     "valid_mod_locations": [
@@ -50,6 +51,7 @@
     "ammo": [ "40x46mm" ],
     "dispersion": 270,
     "durability": 9,
+    "blackpowder_tolerance": 60,
     "clip_size": 1,
     "reload": 150,
     "pocket_data": [ { "pocket_type": "MAGAZINE", "rigid": true, "ammo_restriction": { "40x46mm": 1 } } ]
@@ -73,6 +75,7 @@
     "ranged_damage": { "damage_type": "bullet", "amount": 3 },
     "dispersion": 150,
     "durability": 8,
+    "blackpowder_tolerance": 60,
     "clip_size": 1,
     "reload": 250,
     "valid_mod_locations": [
@@ -105,6 +108,7 @@
     "ammo": [ "40x46mm" ],
     "dispersion": 270,
     "durability": 8,
+    "blackpowder_tolerance": 60,
     "clip_size": 6,
     "reload": 300,
     "valid_mod_locations": [
@@ -138,6 +142,7 @@
     "ammo": [ "40x46mm" ],
     "dispersion": 140,
     "durability": 9,
+    "blackpowder_tolerance": 60,
     "clip_size": 4,
     "valid_mod_locations": [
       [ "accessories", 4 ],
@@ -185,6 +190,7 @@
     "ranged_damage": { "damage_type": "bullet", "amount": 1 },
     "dispersion": 300,
     "durability": 10,
+    "blackpowder_tolerance": 60,
     "reload": 400,
     "modes": [ [ "DEFAULT", "semi-auto", 1, "NPC_AVOID" ] ],
     "clip_size": 6,
diff --git a/data/json/items/gun/40x53mm.json b/data/json/items/gun/40x53mm.json
index 3b9c00b922e9a..eb9c54d2b7cc7 100644
--- a/data/json/items/gun/40x53mm.json
+++ b/data/json/items/gun/40x53mm.json
@@ -19,6 +19,7 @@
     "ranged_damage": { "damage_type": "bullet", "amount": 1 },
     "dispersion": 180,
     "durability": 8,
+    "min_cycle_recoil": 16875,
     "reload": 400,
     "valid_mod_locations": [
       [ "accessories", 2 ],
@@ -31,6 +32,7 @@
     ],
     "modes": [ [ "DEFAULT", "semi-auto", 1, "NPC_AVOID" ], [ "AUTO", "auto", 2, "NPC_AVOID" ] ],
     "flags": [ "MOUNTED_GUN" ],
+    "faults": [ "fault_gun_blackpowder", "fault_gun_dirt", "fault_gun_chamber_spent" ],
     "pocket_data": [
       {
         "pocket_type": "MAGAZINE_WELL",
diff --git a/data/json/items/gunmod/underbarrel.json b/data/json/items/gunmod/underbarrel.json
index 075a835e3e8b4..5990f5f799f8e 100644
--- a/data/json/items/gunmod/underbarrel.json
+++ b/data/json/items/gunmod/underbarrel.json
@@ -289,10 +289,18 @@
     "color": "light_red",
     "location": "underbarrel",
     "mod_targets": [ "rifle", "crossbow" ],
-    "gun_data": { "ammo": "40x46mm", "skill": "launcher", "dispersion": 300, "durability": 10, "clip_size": 1 },
+    "gun_data": {
+      "ammo": "40x46mm",
+      "skill": "launcher",
+      "dispersion": 300,
+      "durability": 10,
+      "blackpowder_tolerance": 60,
+      "clip_size": 1
+    },
     "min_skills": [ [ "weapon", 2 ], [ "launcher", 1 ] ],
     "flags": [ "NEVER_JAMS", "RELOAD_EJECT" ],
-    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ]
+    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ],
+    "faults": [ "fault_gun_blackpowder", "fault_gun_dirt" ]
   },
   {
     "id": "m203_mod",
@@ -317,10 +325,18 @@
     "color": "dark_gray",
     "location": "underbarrel",
     "mod_targets": [ "rifle", "crossbow" ],
-    "gun_data": { "ammo": "40x46mm", "skill": "launcher", "dispersion": 270, "durability": 10, "clip_size": 1 },
+    "gun_data": {
+      "ammo": "40x46mm",
+      "skill": "launcher",
+      "dispersion": 270,
+      "durability": 10,
+      "blackpowder_tolerance": 60,
+      "clip_size": 1
+    },
     "min_skills": [ [ "weapon", 2 ], [ "launcher", 1 ] ],
     "flags": [ "NEVER_JAMS", "RELOAD_EJECT" ],
-    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ]
+    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ],
+    "faults": [ "fault_gun_blackpowder", "fault_gun_dirt" ]
   },
   {
     "id": "m320_mod_mod",
@@ -405,9 +421,18 @@
     "color": "light_gray",
     "location": "underbarrel",
     "mod_targets": [ "smg", "rifle", "shotgun", "launcher", "crossbow" ],
-    "gun_data": { "ammo": "40x46mm", "skill": "launcher", "dispersion": 450, "durability": 10, "clip_size": 1 },
+    "gun_data": {
+      "ammo": "40x46mm",
+      "skill": "launcher",
+      "dispersion": 450,
+      "durability": 10,
+      "blackpowder_tolerance": 60,
+      "clip_size": 1
+    },
     "min_skills": [ [ "weapon", 2 ], [ "launcher", 1 ] ],
-    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ]
+    "flags": [ "RELOAD_EJECT" ],
+    "pocket_data": [ { "pocket_type": "MAGAZINE", "ammo_restriction": { "40x46mm": 1 } } ],
+    "faults": [ "fault_gun_blackpowder", "fault_gun_dirt" ]
   },
   {
     "id": "pistol_bayonet",
diff --git a/data/json/recipes/ammo/40x46mm.json b/data/json/recipes/ammo/40x46mm.json
index 507ed3f1f0822..e6ae3fa91ea05 100644
--- a/data/json/recipes/ammo/40x46mm.json
+++ b/data/json/recipes/ammo/40x46mm.json
@@ -154,5 +154,155 @@
       [ [ "40x46mm_m199_casing", 1 ] ],
       [ [ "lgpistol_primer", 1 ] ]
     ]
+  },
+  {
+    "result": "bp_40x46mm_buckshot_m118",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "shot_forming", 1 ], [ "ammo_bullet", 8 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m118_casing", 1 ] ],
+      [ [ "smpistol_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x46mm_buckshot_m199",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "shot_forming", 1 ], [ "ammo_bullet", 8 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m199_casing", 1 ] ],
+      [ [ "lgpistol_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x46mm_slug_m118",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "bullet_forming", 1 ], [ "ammo_bullet", 8 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m118_casing", 1 ] ],
+      [ [ "smpistol_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x46mm_slug_m199",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "bullet_forming", 1 ], [ "ammo_bullet", 8 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m199_casing", 1 ] ],
+      [ [ "lgpistol_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x46mm_flechette_m118",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "combatnail", 10 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m118_casing", 1 ] ],
+      [ [ "smpistol_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x46mm_flechette_m199",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "combatnail", 10 ] ],
+      [ [ "chem_black_powder", 2 ] ],
+      [ [ "40x46mm_m199_casing", 1 ] ],
+      [ [ "lgpistol_primer", 1 ] ]
+    ]
   }
 ]
diff --git a/data/json/recipes/ammo/40x53mm.json b/data/json/recipes/ammo/40x53mm.json
index 7d68c5d83ed97..6d3778b2df483 100644
--- a/data/json/recipes/ammo/40x53mm.json
+++ b/data/json/recipes/ammo/40x53mm.json
@@ -76,5 +76,80 @@
       [ [ "40x53mm_m169_casing", 1 ] ],
       [ [ "lgrifle_primer", 1 ] ]
     ]
+  },
+  {
+    "result": "bp_40x53mm_buckshot_m169",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "shot_forming", 12 ], [ "ammo_bullet", 126 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 134 ] ],
+      [ [ "40x53mm_m169_casing", 1 ] ],
+      [ [ "lgrifle_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x53mm_slug_m169",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "using": [ [ "bullet_forming", 12 ], [ "ammo_bullet", 115 ] ],
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "chem_black_powder", 194 ] ],
+      [ [ "40x53mm_m169_casing", 1 ] ],
+      [ [ "lgrifle_primer", 1 ] ]
+    ]
+  },
+  {
+    "result": "bp_40x53mm_flechette_m169",
+    "type": "recipe",
+    "activity_level": "LIGHT_EXERCISE",
+    "category": "CC_AMMO",
+    "subcategory": "CSC_AMMO_SHOT",
+    "skill_used": "fabrication",
+    "difficulty": 4,
+    "skills_required": [ "launcher", 2 ],
+    "time": "10 m",
+    "batch_time_factors": [ 60, 5 ],
+    "book_learn": [ [ "recipe_bullets", 3 ], [ "manual_shotgun", 3 ] ],
+    "charges": 1,
+    "reversible": true,
+    "tools": [ [ [ "press", -1 ] ], [ [ "swage", -1 ] ] ],
+    "qualities": [ { "id": "CUT", "level": 1 } ],
+    "components": [
+      [ [ "sheet_metal_small", 1 ] ],
+      [ [ "paper", 1 ], [ "wax", 1 ] ],
+      [ [ "combatnail", 115 ] ],
+      [ [ "chem_black_powder", 86 ] ],
+      [ [ "40x53mm_m169_casing", 1 ] ],
+      [ [ "lgrifle_primer", 1 ] ]
+    ]
   }
 ]
diff --git a/data/mods/Generic_Guns/ammo/gg_ammo_migration.json b/data/mods/Generic_Guns/ammo/gg_ammo_migration.json
index b541473109398..5e22f5f6318a1 100644
--- a/data/mods/Generic_Guns/ammo/gg_ammo_migration.json
+++ b/data/mods/Generic_Guns/ammo/gg_ammo_migration.json
@@ -339,13 +339,26 @@
       "40x46mm_flechette_m199",
       "40x53mm_m1001",
       "40x53mm_flechette_m169",
-      "40x53mm_buckshot_m169"
+      "40x53mm_buckshot_m169",
+      "bp_40x46mm_buckshot_m118",
+      "bp_40x46mm_buckshot_m199",
+      "bp_40x46mm_flechette_m118",
+      "bp_40x46mm_flechette_m199",
+      "bp_40x53mm_flechette_m169",
+      "bp_40x53mm_buckshot_m169"
     ],
     "type": "MIGRATION",
     "replace": "grenade_ammo_shot"
   },
   {
-    "id": [ "40x46mm_slug_m118", "40x46mm_slug_m199", "40x53mm_slug_m169" ],
+    "id": [
+      "40x46mm_slug_m118",
+      "40x46mm_slug_m199",
+      "40x53mm_slug_m169",
+      "bp_40x46mm_slug_m118",
+      "bp_40x46mm_slug_m199",
+      "bp_40x53mm_slug_m169"
+    ],
     "type": "MIGRATION",
     "replace": "grenade_ammo_slug"
   },