diff --git a/src/lib/PlayerVsNPCCalc.ts b/src/lib/PlayerVsNPCCalc.ts
index adcedf97..bddfb2e6 100644
--- a/src/lib/PlayerVsNPCCalc.ts
+++ b/src/lib/PlayerVsNPCCalc.ts
@@ -2156,11 +2156,11 @@ export default class PlayerVsNPCCalc extends BaseCalc {
   private static tbowScaling = (current: number, magic: number, accuracyMode: boolean): number => {
     const factor = accuracyMode ? 10 : 14;
     const base = accuracyMode ? 140 : 250;
+    const clamp = accuracyMode ? 140 : 250;
 
     const t2 = Math.trunc((3 * magic - factor) / 100);
     const t3 = Math.trunc((Math.trunc(3 * magic / 10) - (10 * factor)) ** 2 / 100);
-
-    const bonus = base + t2 - t3;
+    const bonus = Math.max(0, Math.min(clamp, base + t2 - t3));
     return Math.trunc(current * bonus / 100);
   };