What's the pressure 17" down the tube on a vintage 12ga?
Autoloaders are all drilled about right there. Might be a candidate for welding.
A post sometime back outlined the process for mig'ing holes in tubes. Brass/copper plug, inert gas, preheat, etc.

Last edited by ClapperZapper; 06/11/09 10:20 AM.

Out there doing it best I can.