I just recently purchased a IWB holster for my HK P30 and found that the sweat guard interferes with my grip on the gun. The rear edge rubs tightly against my thumb when I grip the gun and prevents me from getting a good grip. It is so tight that I feel with repeated drawings from the holster during practice or at a class it would rub the skin off.
I've contacted the manufacturer and they have authorized a return and asked me to send them a photo. I've haven't had this issue with my holsters for my BHP and HK USP45c, but they are both by another holster maker.
Has anyone had similar issues with holsters they have had?