diff --git a/SVSim.Database/Models/Config/PackRateConfig.cs b/SVSim.Database/Models/Config/PackRateConfig.cs
index d959c14..a17a116 100644
--- a/SVSim.Database/Models/Config/PackRateConfig.cs
+++ b/SVSim.Database/Models/Config/PackRateConfig.cs
@@ -6,6 +6,7 @@ namespace SVSim.Database.Models.Config;
 /// <see cref="ShippedDefaults"/>, not in the initialiser — see PerSlot docstring.
 /// </summary>
 [ConfigSection("PackRates")]
+[Obsolete("PackRateConfig is no longer consulted by PackOpenService — per-pack rates come from PackDrawTable. Retire once v1 stabilizes.")]
 public class PackRateConfig
 {
     /// <summary>
diff --git a/SVSim.UnitTests/Services/PackOpenServiceTests.cs b/SVSim.UnitTests/Services/PackOpenServiceTests.cs
index f54d3da..ac05d36 100644
--- a/SVSim.UnitTests/Services/PackOpenServiceTests.cs
+++ b/SVSim.UnitTests/Services/PackOpenServiceTests.cs
@@ -139,6 +139,62 @@ public class PackOpenServiceTests
         Assert.That(bonus.CardId, Is.AnyOf(300L, 301L));
     }
 
+    [Test]
+    [Category("Slow")]
+    public void Draw_observed_tier_rates_track_seed_within_half_a_percent()
+    {
+        // Synthetic Classic pack: Bronze=76.5/Silver=16/Gold=6/Legendary=1.5 in general slots;
+        // slot 8 is Silver=92.5/Gold=6/Legendary=1.5 (no Bronze).
+        var table = new PackDrawTable
+        {
+            Config = new PackDrawConfigEntry { Id = 10000, AnimationRatePct = 0 },
+            SlotRates = new[]
+            {
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Bronze,    RatePct = 76.5 },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Silver,    RatePct = 16.0 },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Gold,      RatePct = 6.0  },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Legendary, RatePct = 1.5  },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.Eighth,  Tier = DrawTier.Silver,    RatePct = 92.5 },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.Eighth,  Tier = DrawTier.Gold,      RatePct = 6.0  },
+                new PackDrawSlotRateEntry { PackId = 10000, Slot = DrawSlot.Eighth,  Tier = DrawTier.Legendary, RatePct = 1.5  },
+            },
+            CardWeights = new[]
+            {
+                new PackDrawCardWeightEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Bronze,    CardId = 1, RatePct = 76.5 },
+                new PackDrawCardWeightEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Silver,    CardId = 2, RatePct = 16.0 },
+                new PackDrawCardWeightEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Gold,      CardId = 3, RatePct = 6.0 },
+                new PackDrawCardWeightEntry { PackId = 10000, Slot = DrawSlot.General, Tier = DrawTier.Legendary, CardId = 4, RatePct = 1.5 },
+            },
+        };
+        var svc = new PackOpenService();
+        var rng = new SystemRandom(42);
+        var pack = new PackConfigEntry { Id = 10000 };
+        int totalSlots = 200_000;
+        int bronze = 0, silver = 0, gold = 0, legendary = 0;
+
+        // 25_000 packs * 7 general slots = 175_000 general-slot observations.
+        for (int i = 0; i < totalSlots / 8; i++)
+        {
+            var r = svc.Draw(table, pack, 1, Array.Empty<long>(), Array.Empty<long>(), new NoFoil(), rng);
+            for (int s = 0; s < 7; s++)
+            {
+                switch (r.Cards[s].Rarity)
+                {
+                    case Rarity.Bronze:    bronze++; break;
+                    case Rarity.Silver:    silver++; break;
+                    case Rarity.Gold:      gold++; break;
+                    case Rarity.Legendary: legendary++; break;
+                }
+            }
+        }
+
+        double n = bronze + silver + gold + legendary;
+        Assert.That(100 * bronze    / n, Is.EqualTo(76.5).Within(0.5));
+        Assert.That(100 * silver    / n, Is.EqualTo(16.0).Within(0.5));
+        Assert.That(100 * gold      / n, Is.EqualTo(6.0).Within(0.5));
+        Assert.That(100 * legendary / n, Is.EqualTo(1.5).Within(0.5));
+    }
+
     [Test]
     public void Draw_does_not_emit_bonus_for_packNumber_less_than_10()
     {