Ruger had a quote in his last post about faster being harder hitting.
Not always the case. Momentum = Mass * Velocity
Momentum is what kills not speed necessarily. Although speed is a determining factor that contributes to Momentum.
Bullet grains of 150
Velocity of 2900 fps
Momentum = 435000p
Bullet grains 175
Velocity of 2728
Momentum = 477400p