Certainly it does. Even a rifle bullet striking a branch twig will be impeded. Perhaps not by much but it will still suffer to some degree. Once again, my point was heavy clothing and what could be in that clothing. In my SD loads I what the best I can find in the caliber I happen to be using for a given gun. I have to take into consideration things over which I have no control. I see a perp's clothing, body size and structure, and a number of other things to be potential impediments to my chosen caliber and load and I have no control over those.It does not impede it either.