20 ga rifled sleeves for a 12 ga ?

[GWC]

Anybody know a source for rifled 20ga. sleeves to fit in a 12ga.? Got a crazy idea about building a poor boy's double gun for short range work in the thickets .

[gunnut69]

I've seen rifled tubes for screw in choke systems.. Would that sort of thing work? There are also shotgun sub-caliber barrels to allow the use of  shells of differing guages..but why? If using a 12 guage why not just use a rifled tube for the 12 guage... modern sabot slugs should reduce the weight of the bullet and allow the velocity to increase. It would require reloading most likely but I'm not familiar with slug loads offered today. Also remember that building a double barrel rifled gun is not the hard part.. Getting the barrels to shot together at a given range, that's the real trick!! A short pump (or autoloadera) with a rifled barrel installed would produce better results, easier..

[GWC]

Just an idea I've been kicking around for a while. No real purpose for it other than something different. Anybody who knows me, knows I have some wild ideas from time to time.

[SHOOTALL]

most sub gauge tubes are for light loads . I have thought about a double browning or remington with a rifled tube in one bbl .

[gunnut69]

The germans call that 'bockedrilling' I think... A smooth bore on one side and a rifled tube opposite.. Two smooth bores with a rifled barrel centered beneath is called a 'drilling'. Would be helpful if your state allows slugs and buckshot for deer..

[SHOOTALL]

The old cape guns had large smooth bores to the last three or so inches . Paradox guns maybe ? There is one three bbl 20 ga I have seen pictures of.

[IOWA DON]

How about making a cape gun. Put a fully rifled 20-ga sleeve in one barrel. I think it was Hastings where I bought a 20-ga fully rifled barrel. I think one could be turned into a sleeve with a lot of work on a lathe. For the other barrel use buck shot and an insert choke. The buckshot may not hit exactly the same place as the 20-ga slugs. However, the big shotgun choke tube place in Texas (forgot the name) can make choke tubes that are elicptical and move the pattern to a somewhat different point of impact.

[gunnut69]

Are you talking about Briley? I don't have a link anymore but they are the screw choke experts..

[IOWA DON]

Yes, Briley. I have an Ithaca NID 10-ga mag and had them shorten the barrels and add choke tubes. The problem was that one of the barrels impaced off center from the bead. Anyway, they made eliptical chokes for the problem barrel and the gun now shoots where it is pointed with both barrels.

[SHOOTALL]

From what I have read a cape gun only has about 3-4 inches rifling . It is for use with shot and ball.

[gunnut69]

A cape gun has one fully rifled tube with the other smooth bore. The configuration you're talking about is called a paradox gun. They had bores formed into shapes (hexagons?) in the last few inches of the bores.. Most were also choked to a degree and were breech loaders. they fired either shotshells or solid bullet loads put up in metal cases. The capeguns were usually rifle caliber rounds beside a shotgun tube. A sort of forager gun or survivalist weapon.. although I have seen one example chambered in what appeared to be a 32-20 or something similar..  The paradoxes had both bores set up the same way..

[SHOOTALL]

gunnut69 thats right had them mixed up , getting old 
They were used by some traveling military men and by people who collected birds and critters for study and mounting for exibition