v0.6.3: added a quantity adjustment to older missile weapons

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/items/weapon/missiles/MissileWeapon.java

@@ -268,6 +268,12 @@ abstract public class MissileWeapon extends Weapon {
 		//compatibility with pre-0.6.3 saves
 		if (bundle.contains(DURABILITY)) {
 			durability = bundle.getInt(DURABILITY);
+		} else {
+			durability = 100;
+			//reduces quantity roughly in line with new durability system
+			if (!(this instanceof TippedDart)){
+				quantity = (int)Math.ceil(quantity/5f);
+			}
 		}
 	}
 }