Did shoot BlackHawk Vapors 4000's for many years. I started out with a dz and when I changed over to GT Velocity 400's I still had 9 of the original dz. I have one that took 7 deer. I mark them with a marker for each taken.
I bought a new Mathews Drenalin this pasy month and went to GT's for bit more zip. We will see. Thats why I kept my BHV's as a back up if needed.