George -
You said:
Energy is the potential to kill and Velocity is the potential to expand which may be a key factor in killing.
1. Energy is not the potential to kill. Maybe to keep it simple for you I should had said, "Energy is not the killing mechanism in handguns." Pure energy has absolutely nothing do killing in handguns. A certain level of energy is required for what kills in handguns (the bullet penetrating and expanding) to
work. Beyond the minimum required to insure the projectile (bullet) works as designed energy is, for all practical purposes, meaningless in the equaption (except in terms of recoil, muzzle flash, muzzle blast, muzzle flip and other bad effects on control of the handgun). If and when energy weapons are developed in handgun sizes then "energy [will] be the potential to kill."
2. With modern handgun ammunition, velocity is not the potential to expand. Modern handgun ammunition is designed to reliably expand within a "velocity window." Depending on the ammunition, the lower end of the effective velocity can be quite low. Excessive velocity with properly designed handguns bullets is counterproductive (leading to excessive expansion and inadequate penetration).
If the rest of my post confuses you obviously have no idea how a handgun ammunition kills. (Or if you truly have a reading comprehension problem, you might consider adult literacy or remedial reading classes).
To be honest, you probably should not have started at all.