Adjust crude gun spawns (#75155)

* Update guns.json

* Removes charges

data/json/itemgroups/Weapons_Mods_Ammo/guns.json

@@ -167,7 +167,7 @@
     "type": "item_group",
     "id": "guns_pistol_improvised",
     "//": "Makeshift or otherwise poor quality pistols.",
-    "items": [ { "item": "ashot", "prob": 100 } ]
+    "items": [ { "item": "ashot", "prob": 1 }, { "item": "2_shot_special", "prob": 1 } ]
   },
   {
     "type": "item_group",
@@ -476,7 +476,7 @@
     "type": "item_group",
     "id": "guns_rifle_improvised",
     "//": "Makeshift or otherwise poor quality rifles.",
-    "items": [ { "item": "rifle_22", "prob": 60 }, { "item": "remington_700", "prob": 30 } ]
+    "items": [ { "item": "rifle_22", "prob": 60 }, { "item": "rifle_38", "prob": 30 }, { "item": "rifle_44", "prob": 5 } ]
   },
   {
     "type": "item_group",
@@ -663,10 +663,12 @@
     "id": "guns_shotgun_improvised",
     "//": "Makeshift or otherwise poor quality shotguns.",
     "items": [
-      { "item": "blunderbuss", "prob": 70 },
-      { "item": "pipe_double_shotgun", "prob": 70, "charges": [ 0, 2 ] },
-      { "item": "pipe_shotgun", "prob": 100 },
-      { "item": "revolver_shotgun", "prob": 30, "charges": [ 0, 6 ] }
+      { "item": "blunderbuss", "prob": 10 },
+      { "item": "pipe_double_shotgun", "prob": 10 },
+      { "item": "pipe_shotgun", "prob": 20 },
+      { "item": "revolver_shotgun", "prob": 1 },
+      { "item": "slamfire_shotgun", "prob": 100 },
+      { "item": "slamfire_shotgun_d", "prob": 30 }
     ]
   },
   {