diff --git a/backend/src/app.ts b/backend/src/app.ts
index fd92b80..1d4e086 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -117,7 +117,7 @@ const pool = databaseUrl
       password: postgresPassword,
     });
 
-const defaultCalibers = ['9mm', '.22 LR', '5.56 NATO', '.308 Win', '12 Gauge - Birdshot', '12 Gauge - Buckshot', '12 Gauge - Slug', '12 Gauge Sporting', '.45 ACP'];
+const defaultCalibers = ['9mm', '.22 LR', '5.56 NATO', '.308 Win', '12 Gauge - Birdshot', '12 Gauge - Buckshot', '12 Gauge - Slug', '12 Gauge - Sporting', '.45 ACP'];
 const firearmCategories = ['Handgun', 'Rifle', 'Shotgun', 'PCC', 'Other'];
 const sessionHours = 24 * 7;
 
@@ -386,7 +386,7 @@ const ensureSchema = async () => {
 const ensureProfileDefaults = async (profileId: string) => {
   await pool.query(
     `UPDATE calibers
-     SET name = '12 Gauge Sporting',
+     SET name = '12 Gauge - Sporting',
          is_default = TRUE
      WHERE profile_id = $1
        AND name = '12 Gauge'
@@ -394,7 +394,22 @@ const ensureProfileDefaults = async (profileId: string) => {
          SELECT 1
          FROM calibers existing
          WHERE existing.profile_id = $1
-           AND existing.name = '12 Gauge Sporting'
+           AND existing.name = '12 Gauge - Sporting'
+       )`,
+    [profileId],
+  );
+
+  await pool.query(
+    `UPDATE calibers
+     SET name = '12 Gauge - Sporting',
+         is_default = TRUE
+     WHERE profile_id = $1
+       AND name = '12 Gauge Sporting'
+       AND NOT EXISTS (
+         SELECT 1
+         FROM calibers existing
+         WHERE existing.profile_id = $1
+           AND existing.name = '12 Gauge - Sporting'
        )`,
     [profileId],
   );
diff --git a/frontend/src/pages/Home.tsx b/frontend/src/pages/Home.tsx
index ad648da..f534e65 100644
--- a/frontend/src/pages/Home.tsx
+++ b/frontend/src/pages/Home.tsx
@@ -117,8 +117,8 @@ const ammoPageSelectionKey = 'arsenal-iq-ammo-page-calibers';
 const ammoPageSelectionMigrationKey = 'arsenal-iq-ammo-page-calibers-v2';
 const firearmCategories = ['Handgun', 'Rifle', 'Shotgun', 'PCC', 'Other'];
 const allFirearmCategoriesLabel = 'All categories';
-const defaultCaliberNames = ['9mm', '.22 LR', '5.56 NATO', '.308 Win', '12 Gauge - Birdshot', '12 Gauge - Buckshot', '12 Gauge - Slug', '12 Gauge Sporting', '.45 ACP'];
-const boxTrackedCalibers = ['12 Gauge Sporting'];
+const defaultCaliberNames = ['9mm', '.22 LR', '5.56 NATO', '.308 Win', '12 Gauge - Birdshot', '12 Gauge - Buckshot', '12 Gauge - Slug', '12 Gauge - Sporting', '.45 ACP'];
+const boxTrackedCalibers = ['12 Gauge - Sporting'];
 
 const currency = new Intl.NumberFormat('en-US', {
   style: 'currency',