Stevens 311 SXS 45-70...

[am44mag]

You don't see this every day. Someone converted an old Stevens 311 SXS shotgun into a 45-70, and then mounted a scope on it.

https://www.gunbroker.com/item/741912586

https://pics.gunbroker.com/GB/741912000/741912586/pix334969554.jpg

https://pics.gunbroker.com/GB/741912000/741912586/pix412674877.jpg

[nekshot]

I bet that rig is heavy! Those 311's are heavy to begin with. The seller has some very interesting guns for sale.

[sharps4590]

It would look a heck of a lot better without that abortion of a scope on it.

[MostlyLeverGuns]

There is book about this - BUILDING DOUBLE RIFLES ON SHOTGUN ACTIONS by Ellis Brown.

[tim338]

I wonder how well its regulated. With out being able to shoot it first it would make me nervous buying a converted rifle made from a shotgun.

[John Taylor]

Looks like the barrels were lined, probably weighs about 12 -14 pounds. I have made several but I don't think that is one of mine.

[Texas by God]

I have a ten pound limit on hunting guns. That big scope is probably sighed in for one of the barrels only.....

Sent from my SAMSUNG-SM-G930A using Tapatalk

[Shawlerbrook]

Would you have to keep your loads in the Trapdoor range ?

[Chill Wills]

Would you have to keep your loads in the Trapdoor range ?

That would be a safe guess. The liners could be strong modern steel but the shotgun action lock-up is designed for low shotgun pressures. This is a little above of the common shadetree gunsmith (like me) pay grade. Still, I would keep the pressures very low.

[reivertom]

A poor man's cape gun....

[Gewehr-Guy]

At one time European American Armory Corp. sold a 45-70 conversion kit by Tanfoglio, to use in Baikal double shotguns. They would only work in 20 inch guns and I'm not sure if you could fit two of them or only in one side.

Someday I would like to fit a 30-30 tube into one side of a double 20 guage, for a fur and feather getter.

[richhodg66]

There was a long thread on here a few years ago that tracked the whole build a guy was doing just like this.

Not that long ago, someone on gun broker was selling one built on an Ithaca double in .22 Hornet. Pretty neat, but not sure what you'd want such a thing for.

[Texas by God]

There was a long thread on here a few years ago that tracked the whole build a guy was doing just like this.

Not that long ago, someone on gun broker was selling one built on an Ithaca double in .22 Hornet. Pretty neat, but not sure what you'd want such a thing for.
For charging Armadillos!

[John Taylor]

When figuring what cartridge to use on a double barrel shot gun you look at the bolt thrust. A 12 gauge has about 5,000 pounds of bolt thrust which is very close to what a 45-70 factory load has. Most of the old shotguns are made from cast iron or cast steel and will hold up to this pressure. If you want to go with a high pressure round you need a gun that will take the pressure, like the Winchester model 21. A 30-30 has close to 5,870 pounds of thrust. With most of the cartridges lower than 45,000 psi the brass will cling to the chamber wall and not have much bolt thrust but if there is ever a case separation the action will need to be strong enough to handle the pressure. Also the firing pin may need to be bushed.

[missionary5155]

Good morning John Taylor
You mentioned the Winchester model 21... Would you think the Model 24 of being in the same strength limits ?
Mike in Peru

[John Taylor]

The description I found started with "The forged steel receiver body of the Model 24". Most likely this would indicate that the receiver is made stronger than the cast actions. The conversion I did on a 21 was in 416-500. Lots of recoil and lots of muzzle blast and two recoil reducers in the stock. I only shot it using a lead sled and hearing protection. Four rounds in a row left me with the shakes from the concussion of the muzzle blast. Customer was happy with it.

[copdills]

never seen one of those before, and if I did I don't think I would shoot it,

[Jedman]

It doesn't appear to have any extractors or ejectors. If all that was done was to add rifled liners to the unmodified shotgun barrels I doubt it shoots very close to the point of aim at even close ranges like 50 yards.

Jedman

[dubber123]

There was a long thread on here a few years ago that tracked the whole build a guy was doing just like this.

Not that long ago, someone on gun broker was selling one built on an Ithaca double in .22 Hornet. Pretty neat, but not sure what you'd want such a thing for.

Probably me. I did a Brno 12 ga in 50-90. Mine is a strong action, I consider it stronger than a 311. It took a good bit of figuring, breech thrust, load development, etc. Regulating the barrels was a chore. I had 6 months off and on to get the LH to play nice, the RH was easy. No way I was scoping it, so both had to shoot POA, and they eventually did. Mine shot well under 1" at 50 yards for a pair, typically touching in a sideways figure 8. I made my own mold, and it is a paper patched 560 grain RN at just under 1,900 fps. The gun weighs just under 9 pounds as I recall, and balances right at the hinge pin. Its a lot of work. In fact I still have to put the finishing touches on mine.

[John Taylor]

One of the first builds I did was on an old Fox. I converted it to 50 EX and used liners. At the muzzle the liners were a little under the bore size so I drilled and tapped the barrels for adjustment screws. This made it easy to regulate and after I had it shooting the way I wanted then I filled the gap with solder and filed the heads off the adjusting screws. I had plenty of ammo to play with so I ran through about 20 rounds as fast as I could to see what it would do on the target. As the barrels warmed up it started to pull to the right but the space between the barrel remain the same. At the end of twenty it had moved the group about 5" to the right at 50 yards. After it cooled down it was back to center. Doubles are designed for two fast shots on game, not target rifles.

[rbertalotto]

I built one with insert tubes from EAA. See it here:

https://public.fotki.com/Rbertalotto/things-that-go-bang/eaa-baikal-bounty-h/

[justashooter]

i built one on a suhl 16 gauge with greener style cross-bolt. i used marlin 1895 barrels turned down after building up hte extractor cuts by welding. it produced close crossing groups at 35 yards that were combined at 10" at 75 yards. never went to the trouble to sweat in new ribs to correct regulation. cut the barrels to 25" and added late 19th century ladder sight and front ramp on rib.

[Rifle 57]

There is book about this - BUILDING DOUBLE RIFLES ON SHOTGUN ACTIONS by Ellis Brown.

I have this book and it is very good reading.