Whether you carry OWB or IWB you need a solid belt AND a dependable holster. I won't debate clip on versus loops, that's a subject for another thread, but I can make almost any decent holster work if I wear the correct belt. I have discovered that all well made leather belts at 1.5 inches work great so that includes most purpose made gun belts plus a variety of "western" belts.

Dress belts at less than 1.5 inches will only work well with holsters with smallish loops or metal or plastic "clips" that fit the belt correctly. Otherwise there is too much "motion" when your gun is drawn.

As a side note, clipless Remora IWB holsters are WONDERFUL with almost any belt but are especially great with thick, 1.5" leather belts.