Honorary life-time member, pocket carry
I'm no expert in most firearms discussions but I am a self-proclaimed expert in pocket carry in that I have never carried any other way.
A partial list of what I have carried:
NAA mini revolver, .22 LR
Beretta Mod 21 Bobcat, .22 LR
Kel-Tec P11, 9 mm
Taurus Mod 85 ultralite, .38 spcl
Kel-Tec P32, .32 auto
Smith and Wesson mod 638 Bodyguard, .38 spcl
Taurus Mod 605, .357 mag
NAA mini revolver, .22 mag
Smith and Wesson Mod 340SC, .357 mag
Kel-Tec P-3AT, .380 auto
Notes: Of the above group, the P11 was the most difficult to pocket-carry; the best of the bunch as far as power-to-weight ratio was the Smith 340SC. The most easy-to-conceal and the one that goes where no other goes is my .22 mag NAA mini-revolver. Probably my all-around favorite was the Kel-Tec P-3AT but I could not hit the side of a barn with it!
Holsters? For pocket carry, lighter, thinner, and flexible is my preference. I have an Uncle Mike's size 1 and 3. I also have a DeSantis Nemesis which is excellent.
I normally wear Docker-style pleated front pants which makes concealment a dream, especially with a small revolver. With Jeans, I stick with the .22 mag mini.