Not sure about the GR9 with the new bigger engine but the old SHAR definitely had to during the Kosovo campaign (or they were telling porkies to us at the CAOC) their standard load was AIM 120 plus a 1000lb bomb which wasn't really needed as the task was air defence but a number were jettisoned inert. To be fair, as I always am, the USN faired no better and often had to dump unexpended weapons as to bring them back to the ship was too risky. Will Dave be better - I'd darn well hope so or we won't have moved forward very far in 20 odd years!