Not to hijack this thread but I don't know how some of you guys carry full size pistols. Even with appropriate clothing, you can still see I'm clearly carrying something, and I've tried every position with a myriad of holsters. I feel like I'm missing something.
Well, there's what
@Masswhole said. It sounds flip, but is really important advice.
But really, everybody's body is different. Where how you carry a firearm is going to be affected by your body shape, and what you find comfortable. Good equipment (belts and holsters) make a ton of difference, and a hoodie (i.e. dressing around the gun) can hide
a lot of sins. The best way to figure out what works for you is to try on a lot of different gear with the pistols you want to carry, in the clothes you want to wear. This is why so many of us have so many extra holsters at home.
What follows is a single point of data:
I'm about 6'3", 200 lb - slim, but no longer "skeletal." I have a full-sized 1911 that I can put on at about 5:00 and it completely disappears. This is because, frankly, my butt is big enough that it buries the pistol's grip into the hollow of my lower back. Conversely, when I am being less than compulsive about my posture with my Shield at appendix, it prints a little. Of course, the only person who ever notices is me (see
@Masswhole's comment above).
Meanwhile, I was comfortable wearing a G19 and a spare magazine AIWB in the GOAL Fashion Show last month because the pistol had a "claw" on the holster. These claws are specifically designed to turn the butt in against your body, improving concealment. Some other holsters have wedges that push the muzzle end away from the body, which again improves concealment by pressing the pistol grip into your body. These devices may be uncomfortable for some, the only way to find out is to try one on.