How very cool is this? Way!! I'd say!!
I think I'd have to take the risk and go for one more deer with it. Then if I were successful, it would go on the wall.
Here's why I came to this conclusion. I believe your grandfather would approve. Being the hunter he was I'd bet that he'd relish the thought that if his old bow went down doing what he loved, it would be ok with him. It can always be put on the wall even as a broken warrior.
My 2 cents worth!
Congratulations!
I can sure appreciate the "magic" that happened here.
God bless,Mudd