diff --git a/data/json/items/ammo/metal_rail.json b/data/json/items/ammo/metal_rail.json
index 69fe4f6e3d3b2..6c04defe8ae57 100644
--- a/data/json/items/ammo/metal_rail.json
+++ b/data/json/items/ammo/metal_rail.json
@@ -4,8 +4,8 @@
     "type": "AMMO",
     "name": "rebar rail",
     "description": "A short piece of ferromagnetic rebar which has been straightened and sharpened on one end.  Could be used as a projectile by a sufficiently powerful electromagnetic weapon.",
-    "weight": 712,
-    "volume": 1,
+    "weight": 160,
+    "volume": "25ml",
     "price": 1000,
     "to_hit": -1,
     "bashing": 5,
@@ -27,7 +27,7 @@
     "type": "AMMO",
     "name": "steel rail",
     "description": "A short piece of steel which has been forged true and sharpened on one end.  Could be used as a projectile by a sufficiently powerful electromagnetic weapon.",
-    "weight": 520,
+    "volume": "20ml",
     "price": 1500,
     "bashing": 4,
     "cutting": 2,