I would call that a very poor boolit design, and doubt you have much luck with it. Stay as close as you can towards the Loverin design for target and hunting, and be in a happy place. You need to reverse your thinking for cast, think heavy, not light.
I don't own a cartridge rifle that will not shoot under 1.5" at 100 yards, at at least 2100 fps. If they won't do it, down the road they go.