Héctor - I should have explained myself better last time. I'm curious why you are going with the Keith SWC instead of a more traditional rounded head design. I would think the SWC would hamper the potential BC significantly and I know you like a high BC (but who doesn't?) The heavier pellet will obviously help with BC but it seems like you are going quite heavy for a spring gun. Wouldn't something 25 grains or less be a bit more friendly to the spring airgunner?
Granted, I can see some huge potential in this pellet design. If one were to accept 40-50 yard shots as absolute maximum, after you've figured out the trajectory, hold-over/under, etc this design would smack small game like none other! Probably leave a nice round hole in paper too.