doublegunshop.com - home Forums General Discussion German & Austrian Sporting Guns @ doublegunshop.com Proof Marks on Franz Kettner o/u

I still can't figure out how to post pictures directly, but here are more photographs of the various proofmarks including the marks on the receiver:https://drive.google.com/drive/folders/12Ld1C6_t8ervXIjKbg-_dfhgT8ByIeRf?usp=sharing
Der Ami, I doubt it was marked .410 by mistake. The proofmarks indicate that the barrel was rifled originally, and it most definitely is not now. Plus the stars on either side of the "16 x 410" definitely do not have a Germanic look to them. So I am going with Ellenbr's theory that it was originally meant for a rifle cartridge and was bored out sometime by a USAnian gunsmith. Thank you all for sharing your knowledge.

If you could, pleasure us with a foto of the standing breech so we can see the strikers. I would say the top one will be bushed & disk set and nothing on the lower?

Serbus,

Raimey
rse

Too, off the cuff, the 16 gramme bullet would seem to pair w/ the 9,3X74R. I have looked closely @ the lower tube and evidently the marks were worked off for the kalibre. I would think that if it were 0.410" it would be marked 13mm(????) or similar and would wear the Nitro stamp.

I wonder how the 9,3X74R dims and the 0.410" dims compare?

Serbus,

Raimey
rse

Serbus,

Raimey
rse

Lots of Gold Washed components and I would expect it was a game getter with a formidable kalibre on the lower tube and not 0.410"

Serbus,

Raimey
rse

Here is a photo of the breech face.
https://imgur.com/C96QtG3

Alces,
If you confirm that there is no sign of rifling in the barrel, I agree that it must have been converted and the markings changed.

Raimey,
A rim recess for 9.3x74R fits very well for 410, in fact there was recently forum on this site concerning the use of 9.3x74R cases to load 410 shot shells. The person trying this reported that the 9.3x74R rims generally the 410-rim recess very well. My cousin is currently working on a double rifle project for a 65 mm long version of a Lancaster type cartridge. He wound up using 9.3x74R cases instead of the 7x65R ones he started with due to losing too many of the 7mm cases expanding the necks. A 16-gram bullet would fit for a 9.3x74R but my hesitation to agree with that is the amount of metal that would have to be removed to go from .365-.366" groove diameter to a .410" bore. I'm not saying it can't be done, just that it would work better with one of the Lancaster express cartridges (an express cartridge usually has a light for caliber bullet and as I recall, research for my cousin's double indicated somewhere around a 240- 250 grain bullet). It would answer the question if there were enough left of the old bore mark to make it out.
Mike

Well, typical strikers. And Single Kersten lockup


Many thanks Ford.

Serbus,

Raimey
rse

I inspected the odd stamps a bit closer & it reads: >>X 16 X 4l0 *<< and the characters are very amateurish.

Serbus,

Raimey
rse

I don't see any signs of filing on the barrel, so I can't say if they filed any proof marks off. Should I be at all concerned about putting .410 bird shot through this thing?