From: Juvat

What kind of numbers are you looking at with a H&K USP 40 Compact LEM?

Just curious...and out of pocket for five days.

Juvat

The formula for kinetic energy is

K = ½mv²

where K = kinetic energy, m = mass of the bullet and v = velocity of the
bullet.

Bear in mind most people use muzzle velocity as opposed to impact velocity.

The actual damage done to a body also takes into account cross sectional area
of the bullet, trype of bullet and inertia.

One thing to consider when choosing bullet types is what the target might be
wearing. Winter clothes tend to clog the cavity of a hollow point and reduce or
eliminate expansion. High velocity solid bullets may go through the target and
hit something not intended. The latter is why Mag-Safe, Glaser Safety Slugs etc
are made.

Dan, U. S. Air Force, retired