You will find that BP fouling will start causing binding of the cylinder on any gun with as tight of base pin fit and barrel/cylinder gap as the average FA revolvers have. I have a custom Ruger Old Army that was built by Clements. It has very tight tolerances and because of this I have to remove the cylinder and clean it at least every 10 shots or it gets hard to turn. I really don't mind as it is the guns tight tolerances that make it so accurate. I think if I were wanting to fire BP cartridges in a revolver I would do it in a stainless Ruger and not a Freedom Arms.