Picked up a 5.11 tactical gun belt, because I usually destroy belts in nothing flat (even web belts get ripped to shreds in nothing flat). Had to tweak my holster to fit it, but it fits SO nicely now. The angle is even better, and it's in there with absolutely no wiggle or slip.
Basically, if you don't have a gun belt? Go buy one, totally worth it. Gotta order one of these for my dad for Father's day, he has the same problem with belts (still need to get him to actually pick out a concealed carry gun, he took the course for the permit with me)