Open Carry at the Post Office?

While standing in line today to pick up some packages and I noticed the guy in front of me was open carrying a Glock in a Serpa-style holster. He was not in any kind of uniform. If he was some form of law enforcement officer, he was either off duty or under cover.

Have I been misinformed about the law regarding guns in federal buildings? Aren’t all Post Offices considered Federal buildings?

There are no gun-buster signs anywhere in the Post Office that I can find, and I have been going there for 4 years now. I always remove my licensed concealed carry pistol from the holster and leave it in the car while I go in the building.

Am I wrong? Can you carry into a federal building if there are no signs?

With confirmation from the Virginia State Police, that New Mexico is NO LONGER RECOGNIZING Virginia CHPs because we don’t require range time. We never have, odd that they are just now figuring that out. Perhaps they had a change in their law somewhere down the line.

New Mexico does NOT honor Florida or Utah non-resident permits, either.

Here are your options:

1. Open carry

2. In your vehicle you can have a concealed handgun. New Mexico views your vehicle as an extension of your home.

Virginia continues on the highroad, honoring New Mexico permits.

I was reading the promotional material in a Hornady publication for their new Critical Duty line of ammunition. Their 9mm 135g +P looks appealing, largely because it leaves the barrel with more energy than their Critical Defense line. (It also retains energy better over distance, which is not likely to matter if it ever gets used on the street.) What I noticed was that the test rounds generally penetrated somewhere between 13 and 15 inches, regardless of the barrier type.

Depending on shot placement in a real world situation, 15 inches seems it could easily exit a relatively skinny person (assuming no barrier other than winter clothing). (My torso is roughly 12 inches deep, from what I can tell by measuring myself.) I realize that penetration is often not straight line, bouncing around off bones and such. However, I imagine that if you were to shoot someone in the gut, or perhaps hit them in the chest and miraculously miss all the ribs in the process, a 15-inch penetration would exit the other side.

A couple questions arose from this thought process: 1) how well matched is ballistic gel to human tissue in terms of density? 2) Does anyone know if there is reliable information on bullet energy after exiting a torso (or leg, arm, etc.) and how damaging such a bullet would be? I know that this is impossibly broad in terms of potential outcomes, since ammunition type, clothing, size of a person being shot, shot placement, etc. will all affect the outcome. But I’m curious if there is some semi-scientific answer to my first question and if there is anecdotal/experiential information on the second question.