Just a suggestion, I have a "Sticky" brand IWB holster in adddition to a "Remora" IWB. Both do not utilize any hooks or loops to secure the holster. Instead, they both use a type of neoprene like cover to hold by friction. An added bonus is they seem to hold your pants up as well and don't drag them down at all. I found them to be quite comfortable with a .38 snubby or a 9mm auto. Don't have anything larger so I can't offer any opnion other to say I think they would work as well.
Those who live by the sword will be shot by those who don't!