Gun volume auditing for .32 (#37637)

* Audit Skorpion Vz. 61

* Audit Sig Sauer P230 volume

* Audit Walther PPK

data/json/items/gun/32.json

@@ -8,7 +8,7 @@
     "name_plural": "SIG Sauer P230",
     "description": "The SIG Sauer P230 is a small, semi-automatic handgun chambered in .32 ACP.  Due to its small dimensions, it was often carried as a backup weapon.",
     "weight": "460 g",
-    "volume": "250 ml",
+    "volume": "312 ml",
     "price": 43000,
     "to_hit": -1,
     "bashing": 8,
@@ -46,7 +46,7 @@
     "//": "Total unloaded weight of gun 1301.81 grams, rounded to 1302.  Current weight of folding stock 200 grams.",
     "description": "The Skorpion Vz. 61 is a Czechoslovak submachine gun from the 1950s, chambered in .32 ACP.",
     "weight": "1300 g",
-    "volume": "750 ml",
+    "volume": "788 ml",
     "price": 150000,
     "to_hit": -2,
     "bashing": 9,
@@ -86,7 +86,7 @@
     "name_plural": "Walther PPK",
     "description": "One of the most famous handguns of the 20th century.  Your name is not Bond, but you might find this little gun still useful.",
     "weight": "540 g",
-    "volume": "250 ml",
+    "volume": "216 ml",
     "price": 45000,
     "to_hit": -1,
     "bashing": 8,