Sounds neat.

Yes, I would slug them so you know the exact inside diameters, this will show you just how much she has been shot. I always have the bores slugged prior to buying a vintage double rifle, even if the bore looks good to the naked eye.

Ken Eversull, David Yale, Owen, are all good choices, and are 100% trustworthy with such a gun.

Keep me in mind should you want to cash out.