unless you are carrying a mouse gun in your pocket all weapons will "show" at some point
I don't think so. I mean, I guess, sure at
SOME point if you work at it, you can print a concealed pistol. By the same token, with less work, you can
not print.
I've got a Wilderness Belt, and a Kramer IWB rig I usually wear. I've stood in the bathroom and all but done jumping jacks to see what prints and what doesn't. With a tucked in undershirt, I can wear an untucked T shirt one size up and not print anything recognizable. I've even worn a dark Nike Dri-Fit shirt from the NFL shop and not printed unless I worked at it. I had to bend over at the waist, and twist. And this is carrying a full size 1911.
Maybe a double stack is different, I don't know. Looking at my reflection, I can see a crease made by the bottom of the magazine, but that's about it. And I only know it's the bottom of the magazine because I'm wearing the pistol, know it's there, and know exactly where it is to know what is making that crease. When I put on another layer for a cover garment, even that all but disappears.
Strangely, I'm far more cognizant of another aspect giving me away. Especially when I'm sitting, I hear every creak that leather holster makes. But again, because I'm - for lack of a better term- self-conscious of the fact that I'm carrying, I both notice the sound more, and know what it is.
By the same token, behaviorally I know I print. Hitching up your pants when you get out of the car. Tugging down your cover garment. My first holster was a Serpa Paddle/OWB combo. And even wearing a full hoodie, I could easily expose the bottom of the holster after sitting in a car, and picked up the habit of checking that hemline rather quickly.