Gunsmithing 45/70 over under on shot gun action

[Bubb]

Well it something I've wanted and must have... I've seen it can be done, but not sure who did it. A 45/70 double gun over/under on a ruger red label action. This isn't a easy build to get both barrels to line up at point of aim! Any body know who could pull this off? 1 1/2" or better for both barrels at 100? Black bear/ deer brush gun that's what for so don't ask...

 

[Turd in the Pool]

Don't know if he'll mess with rifled tubes but Kirk Merrington in Ingram TX is one of the best with double smoothbores. Told me that he learned/made bbls in London. If he won't do it, I'd bet he knows someone that can.

 

[Drifter™]

Link to barrel inserts / liners:

OUR COMPLETE LINE OF SHOTGUN INSERTS TO INCREASE THE VERSATILITY OF YOUR SHOTGUN

Link to how-to book:

BUILDING DOUBLE RIFLES ON SHOTGUN ACTIONS | Brownells


If a side-by-side would suffice, here's a reasonably-priced option (~$800 street price):

http://eaacorp.com/portfolio-item/mp221-side-by-side-break-action-rifle-baikal/