With my 75 Shadow the B.T. DOH rubbed finish off "fast"---especially from the muzzle back on the sides. With my 75B's version of the same holster it caused little wear. Both holsters are the models said to fit at CZC--and they do fit well for comp./range use.
My Sig P239 shows virtually no wear in another type of Kydex/plastic IWB holster.