I think I ran across an American barrel maker (ER Shaw? maybe.) that listed rifled 12ga tubes.

Regulating would be a critical piece of the project. Not that it would be all that technically difficult. Just hat it would need considerable time investment. You'd need to settle on the load and distance beforehand. It most certainly can be done and has been done. Nothing new under the sun for this project. Just a matter of investing the time and money.

Last edited by Chuck H; 04/27/12 01:54 PM.