I could add a QR for it, and a rules set so that that rule is disabled for quests with a 2.50.2 header. 'Wand Projectile Damage Scales with Wand'; otherwise enabled by default.
Knowing that it was changed/broken in 2.50.2 is useful. Thank you.
Looking at the code again, the magic projectile power is set by either the Magic Book item, or the Wand item; but the magic book has priority:
Code:
int pow = (bookid != -1 ? current_item_power(itype_book) : itemsbuf[itemid].power)*DAMAGE_MULTIPLIER;
I know that I addressed this in the past. I believe that the way this works in all 2.50.x versions, is that the Power of a the player's highest level Magic Book item replaces the Power of all Wand items.
I need to check the 2.50.1 sources and see if it was changed there. No, it has not changed since 2.50.1.
Note that this is something that I adjusted in the 2.54 sources a long while back.