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NitroXAdministrator
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Gustav Genschow Clam Shell action double rifle 404 Jeffery
      #354941 - 06/07/21 08:55 PM

"Bombay Armoury" Gustav Genschow Clam Shell action double rifle in 404 Jeffery.

Owned by Anthony G, he is looking for more information on the rifle. I have some comments recorded.





Clam shell action





Chambered in .404 Jeffery rimless





Express sight leaves in 100 to 500 yards (or metres?)



Made Specially for the Bombay Armoury



It appears the Bombay Armoury was a prominent gun shop in India in the 1930's and one of two main Rigby importers and dealers. The major importer being Mantons.



Chamered in .404 Jeffery





Made in Germany







Nice engraving.















12/27 = December 1927 ?

26 grms = 401 grs projectile

73 mm = case length

10.4mm = presumably 10.75mm ???





















A couple of suggested references sincluded for future reference.







--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"


Edited by NitroX (06/07/21 10:38 PM)


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85lc
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: NitroX]
      #354943 - 07/07/21 01:02 AM

John,

This is a very nice looking DR. Thanks to you and Anthony G. for posting.

If Anthony G. is a member of the GGCA, he should reach out to Axel E. who is extremely knowledgeable about German rifles. Axel has been very helpful in identifying German guns and providing background about the maker and action.

--------------------
RB


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lancaster
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: 85lc]
      #354948 - 07/07/21 01:46 AM

Kuduae is an excellent friend of Axel E., maybe his best

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Igorrock
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: lancaster]
      #354949 - 07/07/21 03:59 AM

Quote:

Kuduae is an excellent friend of Axel E., maybe his best



Doctor Jekyl & mister Hyde....

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Louis
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: lancaster]
      #354950 - 07/07/21 04:00 AM

Really nice DR and congratulations on the owner!
Louis

--------------------
"Everything that doesn't kill me makes me stronger"


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93x64mm
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: Louis]
      #354954 - 07/07/21 07:33 AM

That old girl has seen some very hard hunting yards indeed!
Might be weathered a bit on the outside but still looks like it's only just getting warmed up!
Those extractors being so small you would think wouldn't be effective, amazing pieces of kit really to pull such big cases out.
Marvellous to see such a rifle in .404 Jeffery, I wonder if the proof load would be there on the flats as well?
Amazing find, hope to see how she performs later on some game.
Well done indeed.


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sbs470
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: 93x64mm]
      #354956 - 07/07/21 08:34 AM

That is exactly the same as the 500 x 3.25 nitro for black that I used to own . Mine had claw mounts.
Also made in 1927.
the 500 had henry rifling even though it was made in 1927
It shot 80 grains of ADI 2208 { Vargent } with a 440 grn Woodliegh at 1935 fps and was very accurate


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NitroXAdministrator
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: sbs470]
      #354960 - 07/07/21 03:11 PM

Is a clamsheel design stronger than most? Does all the "clam" design also help protect from case rupture and gases if it should occur?

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
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kuduae
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: NitroX]
      #354964 - 07/07/21 09:57 PM

Gustav Genschow & Co. AG, tm “Geco”, Berlin, founded 1887, was a German ammo maker, wholesaler and dealer with factories and outlets in several German cities. Though they made many .22 smallbore rifles themselves, they had their “better” guns made for them by the Suhl, Zella-Mehlis and Liege guntrade. Post-WW2 they came under the control of RWS who still use the Geco trademark for some economy ammo lines.
This clamshell double rifle was made for Geco by Ernst Kerner & Co, Lutterothstr.7, Suhl. Founded 1892, the company was finally closed down by the Soviets in 1947. Ernst Kerner, 1867 – 1939, invented, among other improvements, Kerner’s improved Anson type boxlock with the top-hung sears. This design later became the Suhl standard for boxlock guns and is used to this day. On guns he made for the trade he used that ornate K mark instead of his usual capercaillie / EKO trademark.
As you have noted, this double rifle was proofed in Suhl December 1927 for use of a Nitro = smokeless load with a steel jacket 26 gramm = 401 gr bullet, most likely for use of the contemporary DWM load: a 26 g bullet in front of 5.2 g = 80.2 gr Walsroder 1919 powder for a mv of 710 m/s = 2330 fps at 3150 kg/cm² pressure, 28” barrel. The 73 (mm) stands for the case length, but the 10.4 mm neither for the bullet nor the groove diameter, it stood for the narrower bore (before rifling) or land diameter of the barrel. Other marks are unidentified individual ones of the several craftsmen involved in the making, like barrelmakers, actioners and so on.
As you may see from the screw at the rear top of the action body and no screw at the rear bottom, the rifle is built with Kerner’s top hung sears. These allowed to move the sear detents as far away as possible from the axis of the hammer movement. So the mainspring applied much lesser pressure on the detent, allowing for lighter and safer trigger pulls than the original Anson Deeley design with the bottom sears, engaging the hammes very close to their axis.

The clamshell action body design served the same purposes as bolsters and side clips on other break-open actions, but more efficient: It strengthens the right angle from breech face to action bar and takes up the sideways stresses when firing side-by-side barrels. This strengthening of the action body without adding a lot of weight made it popular in Germany for double rifles using high pressure loads. Fitting the barrels to such a clamshell action was much more complicated than fitting them to a conventional water table. This made clamshell actioned guns more expensive than conventional break-opens.


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NitroXAdministrator
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: kuduae]
      #354967 - 07/07/21 10:52 PM

Wonderful detailed answer, Kuduae. You are a real asset and source of exact information here. Thanks.

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"


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Huvius
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: NitroX]
      #354969 - 08/07/21 12:17 AM

Quote:

Wonderful detailed answer, Kuduae. You are a real asset and source of exact information here. Thanks.




Agree 100%!
Never fail to learn something of value from you Kuduae!

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PatagonHunter
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: Huvius]
      #354974 - 08/07/21 04:20 AM

Thank you kuduae! You are an open book in this matter!

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Waidmannsheil
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: PatagonHunter]
      #354975 - 08/07/21 06:53 AM

Great Answer Kuduae, very Informative.

Matt.

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93x64mm
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: Huvius]
      #354982 - 08/07/21 07:48 AM

Quote:

Quote:

Wonderful detailed answer, Kuduae. You are a real asset and source of exact information here. Thanks.




Agree 100%!
Never fail to learn something of value from you Kuduae!




Couldn't have put it better - Thanks mate!


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85lc
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: 93x64mm]
      #355012 - 09/07/21 01:24 AM

kuduae, Thank you. Your writeup is very informative. The Kerner design seems to be a nice upgrade from the Anson Deeley design in terms of a better trigger pull.
I like the looks of a clamshell double rifle, just don't see many.

--------------------
RB


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Rockdoc
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: 85lc]
      #355040 - 09/07/21 12:56 PM

Thanks kuduae, I was wondering if it was proofed for the equivalent of the RWS load. Interesting regarding the sear positions.

Lovely rifle in a higher pressure cartridge. Nice weight for a 404J too.


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Yochanan
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Re: Gustav Genschow Clam Shell action double rifle 404 Jeffery [Re: Rockdoc]
      #355324 - 19/07/21 03:52 AM

Great old rifle. There was one recently for sale in Sweden but stamped H. Barella Disasembly and an ulrasonic bath or two will make miracles.

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