For hunting, I just need enough velocity to cause the bullet to expand at impact, and completely penetrate the animal.
Old70
For most of my hunting purposes a bullet leaving the muzzle at around 2700 fps gets me there
Trystan
Lots of deer killed by projectiles only going about 80 ft/sec. Not much expansion or penetration required.
Wrecks a lot of meat though. I don't recommend it.
Jerry