I have the 7.5" and I haven't worked with it much, but it leads up something awful with .452 lead, I tried some Schofields from Black Hills and had to really scrub the cylinder to get it cleaned out, the throats all measure out at .451. I've heard the opposite mostly that the throats are undersized. I've decided to either open up the throats or try Nosler and Sierra .451-.4515 bullets to see how it does. I haven't slugged the barrel yet so that may end up being the deciding factor.