I'd oil the screw, gob some epoxy around it, stick it in the hole and let it dry.
It's not often you need to remove a recoil pad anyway, but the oil on the screw ought to make it possible.
The thing about epoxy is that it builds up, and there's its main value. It fills in holes.
The dowels and drilling mentioned are at least as good and probably better, but how good does it have to be?
