OK, Guys, I am a fan of Hoppes #9 on regular guns so I will forget the "Bore Butter buildup" and scrub it all out with a brass brush and Hoppes. I had a TC that a friend had done the Bore Butter scheme with. When I washed out the Bore Butter there was rust under it. Maybe it rusted before he used the Butter, I don't know. I sold that gun to a guy who was going to put a different barrel on it. I will end each shooting session with hot soapy water then brush with Hoppes after it drys. I clean my guns far more then I shoot them anyway, and like the bores to shine.
I had a Lee's lead puller for that old .357. I gave the gun to one of my sons, but I think I still have the lead puller around somewhere. It worked to some extent, but shooting a jacketed bullet every other round seemed to work too. I don't see ads for the Lee's any more, they must have gone under.