To the knowledgeable? What causes barrel leading? How do you clean it and prevent it. I have leading every time I shoot my Rossi 720, 44 special. It could be just powder residue?
If it is leading you will see shiny flakes of lead when you run a bush wrapped with a wet pad thruogh the barrel.It could be just powder residue?
If it says "Chore Boy" with a picture of the little chore boy wearing a read hat, then it is made of pure copper. The knock offs like those found in Walmart which look the same will not have the name chore boy. Look closely and you will see you can turn the pad inside out like a sock. Cut one strand and pull on it and you will have a strand about 12 to 18 inches long. Wrap that around a 38 caliber brush and it is just about right to run down the bore. This method does work well for removing lead without buying some kind of expensive product.That will work! However, there are some Chore Boy clones that are just copper coated steel pads.
Can't agree or disagree with your statement as 99% of what I shoot is Wheel Weight alloy with a little tin added for fill out. That would be just 11-13 BHN though I have water dropped 22 caliber cast that jumped up to 18 BHN for shooting in the 223. So I've never had any experience with really hard alloy but I've read many reports that state hard cast has leaded more barrels than soft cast.Biggest cause of leading in a revolver, any revolver, is too hard of a bullet, regardless of the size. Run a softer alloy of 13bhn or softer, 16:1 or 20:1 will be perfect and size them to the EXACT size of your forcing cone. The bullets need a chance to obturate. If they can't obturate, or they're too hard to obturate, they'll shave as they enter the forcing cone and gas cut something serious. If you can't get your calipers into your forcing cone for a good measurement you'll need to make a careful slug casting, or a cerrosafe cast.