Matt's definitely 100% correct on this Jeff. If you are shooting speed restricted 3D @ 280fps I would change the arrow, not the bow. Always shoot the bow wherever you shoot it best, and change the arrow recipe accordingly. You can get an advantage this way that you would be giving away if you simply changed the bow.

You can at least try to make up for that restriction by shooting the fattest shaft that you can shoot wellto cut some extra lines. The year I won my ASA state championship in HC I shot 30X Pro's fletched with blazers, and with 100 grain glue ins at around 281fps. Those things really cut some lines and hog up the X ring and to be honest I never sawmuch of a difference in my scores from a 315fps rig in hunter class all the way down to 280 or so. Speed matters much more from the long stakes, but in HC the pins only go so close together on most sights at these distances.

The lasttarget I shot in that ASA shoot, Ibarely licked the 10 ring with that 30X pro.2nd place ended up 2 points behind me [8D].