I gave up on trying IWB carry with my PC 627-5 (2-5/8"). Although I've recently lost some of my belly and have some extra room, IWB or AIWB is just not comfortable for me with the relatively large and heavy N-frame. And as you say, it's difficult to conceal. I do AIWB carry my PC Shield Plus 9mm in a CrossBreed AIWB holster with minimal issues. But for my N-frames, I prefer to use an OWB crossdraw leather holster covered by an untucked shirt or light jacket. Good luck!