I think what your noticing in factory ammo is the same marketing ploy as the "+P" myth.

Decrease the velocity, change the ogive of the bullet, package the rounds in boxes of 20 and call them "Laser Beam Black Death Talons!!!"

Shooters will beat a path to your door to buy.

Reloaders are the last ones to accually study ballistics and know the difference between performance and Mierda de toro.

GF