After an exhausting session with Victoria's Secret Police, "John R
Weiss" blurted out:

OTOH, a short .410 gauge shotgun will likely have less muzzle energy (650 ft-lb
typical for slugs) than a max .45 Colt (410-840 ft-lb -- using comparative
figures for a multi-purpose [.45 Colt/.410 shotshell] Thompson/Center Contender
handgun) or typical .44 magnum (1100-1600 ft-lb) load, and slightly more than a
.45 auto (350-530 ft-lb). A 16 or 20 gauge shotgun will, obviously, be
somewhere in between (1400-2000 ft-lb).

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