I recently got a Stevens crack shot. Great shape, especially for being 100 years old, with one exception the barrel is leaded so badly you can hardly see the lands and grooves.
I don't think it has ever been cleaned other than being wiped off.
I have tried every kind of lead remover that I can find, let if soak for hours, wore out a brush and I'm not making much progress. I have had to use a 17cal. cleaning rod becuase my others wouldn't fit.
Any suggestions?

Thanks