[delta13soultaker]

I understand now what you're saying better. Yeah it is interesting how close the energy seems.

Velocity is a useful number to a guy. He can use that along with bullet weight to closely guess a given trajectory. Add in the ballistic coefficient etc etc and he can guess really damn close. I say "guess" because air temperature, humidity and mother nature have the right to change their minds at any moment and play games with velocity (i.e. trajectory/your close and far zero).

But energy in ft-lbs? It is a general guess at what a bullet might do.

People who make and sell ammuntion love ft-lbs. It makes a bar to measure against that shooters (customers) can see. It's just like in casinos....games where a percentage of wins vs losses is displayed gets more players. But that percentage from past plays has zero effect on the next plays. None. Looking at ft-lbs is kind of like that.

Car makers and dealers love horsepower. It sells cars. But real car guys look at a whole lot more than just horsepower because they know it takes more than that to make a car go fast. Torque, powerband, etc etc.

Marketing is marketing.