I know this'll be different for everyone, but at what hour around your waist do you prefer your IWB holster? I use a Kholster primarily and have worn it at 2:45 (slightly ahead of my seam) and 4, depending on what kind of outfit I'm wearing.
"...the right of the people to keep and bear Arms, shall not be infringed."
I wear my Kholster at the 4:00 - 4:30 position. I find it is even comfortable for me on long drives as well as normal activities. This position also affords me a good location to draw my pistol with either hand.
Mostly at 6oc. 3oc when the pants allow. (I need to go fit some new pants). I have been using a smart carry al little more though lately. Takes a little getting used to as it breaks in. That is at 12oc. It is a bit more comfordable than I thought it would be.
Sig Sauer P220R Carry Elite in a IWB Crossbreed Supertuck at 15:00 to 15:15 with a lot of forward rake. Once the holster breaks in this is very solid and close in for concealment under a 5.11 brand shirt.