[CapandBall]

Hmmm, I got an old unaccurate S&W model 10 revolver, a smith said the forcing cone might be lead fouled. Is such a tool made to address that? Is this a similar problem?

Where did you get the "Merril" tool? How much?

[Shooter 2.5]

There was an article in Precision Shooting magazine that mentioned it and the ammo store owner where I live contracted a machinist to make them. I don't know if they are commercially available beyond the owner selling them in his shop. I'll get more information Monday.

There is a device called a Lewis lead remover that's been on the market for years and it's in the Brownell's catalog. It's basically a wire screen that fits onto a special cleaning rod. That may be the item that you need for your forcing cone. It's made specifically for cleaning forcing cones and barrels. With the adapters, brushes and all the assorted pieces it's around 25 dollars. They're on the web.