[Boge]

I think a VERY important aspect of Gurps, which goes overlooked far too often, is that even though the logic would lean towards something different, sometimes the rules are there for gameplay balance instead of realism.

Arm ST or Lifting ST seems more realistic and logical to me for using a bow. But for gameplay and balance purposes, maybe Striking ST is the better option. When in doubt, go with the book rules. That's my take.