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Joined: Oct 2012
Posts: 29
Boxlock
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OP
Boxlock
Joined: Oct 2012
Posts: 29 |
I see that a company in Germany makes insert barrels to convert modern shotgun barrels to double rifles. I believe the name of this company is Keppeler. Does anyone make similar insert barrels in the United States?
Some of these insert calibers seem to have really high pressures (I.e. a .243 win @ 65,000 psi). Are the actions in modern guns really that strong for the pressure?
If so I'd like to do an over/under in .375 or .470!
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Joined: Jun 2008
Posts: 5,536 Likes: 169
Sidelock
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Sidelock
Joined: Jun 2008
Posts: 5,536 Likes: 169 |
Please review the inserts from Lothar Walther http://www.lothar-walther.de/249.phpNot sure you will get what you want as the pressure for the cartridges you mention is above the operating pressure of most shotguns Ellis Brown has written a fascinating book http://bundukipublishing.com/doublerifle.htmMike
Last edited by skeettx; 10/01/13 08:18 PM.
USAF RET 1971-95
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Joined: Oct 2012
Posts: 29
Boxlock
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OP
Boxlock
Joined: Oct 2012
Posts: 29 |
Thanks. That book is quite interesting. Do you know of anyone who does double barrel conversions? The insert barrels are interesting.
Is the barrel or the action of a shotgun which makes such a firearm unable to withstand higher pressures?
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Joined: Oct 2009
Posts: 6,494 Likes: 396
Sidelock
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Sidelock
Joined: Oct 2009
Posts: 6,494 Likes: 396 |
I have the Ellis Brown book and found it fascinating. If you want to learn more about what's possible you might spend some time on the NitroExpress forum.
The world cries out for such: he is needed & needed badly- the man who can carry a message to Garcia
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Joined: Oct 2012
Posts: 29
Boxlock
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OP
Boxlock
Joined: Oct 2012
Posts: 29 |
I will order a copy of the Ellis Brown book. My question, in general, is if there is any gunsmith within the country who would make a companion set of barrels/inserts for a modern over/under.
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Joined: Jan 2002
Posts: 13,172 Likes: 1158
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 13,172 Likes: 1158 |
There is, but I cannot remember the details about him for the life of me. We corresponded a few times several years ago. He builds double rifles out of Beretta S x Ss, if I recall correctly.
We talked about the accuracy and he sent me numerous targets he and his son had shot with them. The accuracy was nothing short of amazing.
Not a well known name.
SRH
May God bless America and those who defend her.
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Joined: Oct 2012
Posts: 29
Boxlock
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OP
Boxlock
Joined: Oct 2012
Posts: 29 |
If I knew who he was, I'd gladly pay him to do a set of barrels for a Beretta o/u.
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Joined: May 2011
Posts: 742
Sidelock
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Sidelock
Joined: May 2011
Posts: 742 |
Win. model 21 would definitely hold up under the pressure. Having a set of rifle barrels along with the shot barrels would be sweet...Steve
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Joined: Aug 2006
Posts: 601
Sidelock
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Sidelock
Joined: Aug 2006
Posts: 601 |
Most SG to DR conversions use the SG barrels that are cut down to form a mono block to set the new rifle barrels into. Making a new mono block would be a major undertaking.
There are some SG actions capable of this type of conversion. I have a JP Sauer that was reworked into a 450 NE. It's a very good shooting DR.
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
There are several factors which come into play here. As the chamber for the rifle cartridges are smaller you are adding extra metal around the cartridge to handle the higher pressure in the barrel. Back thrust to the action is a factor of area times pressure. As the rifle cartridge head is smaller thrust is not just a factor of PSI's. Another factor, just for the record, is you can "Only" make a monoblock from Scratch, you cannnot make one by cutting off an existing set of barrels. "MONO" = 1. A Monoblock is made from a single piece of steel. Neither a chopper lump, dovetail or other methods of jointing can be converted to a monoblock.
Miller/TN I Didn't Say Everything I Said, Yogi Berra
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