What are you wanting the speed to do for you? If it' s flatten out your trajectory, how much more speed do you think you need to get there? 10 fps? 20? It' s good to have a goal to work toward, so you can plan how to get there and make decisions on whether or not it' s worth it.

My bow will shoot a 375 grain arrow at 288, 500 grain at 252. At 30 yards, the 500 grain only hits close to 4" lower than the 375 grain, not to big a difference.

The CE T hunters are built heavy to provide more momentum and KE when launched from the same bow. Going lighter on your arrow will get you more speed and a slightly flatter trajectory (depending on how light you go), but will cost you KE and momentum, which has the POTENTIAL to impede penetration over your current set up.

What isn' t your set up doing now that you want it to?