Thanks Mike. Do you have the website address, or last name for Walter?

The barrels have not been cut off yet. I think in this case, factoring in costs and the equipment, it would simpler to go ahead and cut them, and use the mill/boring bar method.

The barrels in question are a set of damascus tubes from a Charles Osborne 12ga boxlock. I have $80 in the gun, so the risks are low. I would like to learn this process, and get school credit for the experiment.

A source for tubes I can afford are probably the biggest obstacle at this point.