Originally Posted By: NiklasP
Tobais,

NONE of my old Swedish or German doubles have any chamber lenght stamped on them. I measure chamber lenghts with mm ruller trimmed to fit nicely into individual chambers. These measurements are correct for my individual guns, not something assumed by someone. I really don't care at all what Brits stamp on their guns or on their ammo boxes -- I only have Swedish or German hammer doubles.


There has never been any law regulating thsi in sweden so normally chamberlength is left out on older HVA.

For German laws you can see http://www.shotguns.se/html/germany.html where I have tried to collect what is known about German proofmarks. And believe me there is a lot of information lost regarding this from Suhl proofhouse.

Buit as I wrote: it's not all about the cahmber length (that is from barrelplane to cone, there is a questions about diameter in the chamber as well. If you measure on to the cone - you be home free you think - wrong becuase of the more narrow mouth of the chamber due to overwad cartridges and opening resistance.

You should measure with the correct size of the chamber mouth, if you then don't reach the cone that is not important since you should not fire a cartridge in a to narrow chamber..... Many meassure the chamberlength with less than minimum diameter, which is wrong.

Quote:

Yes, I am aware that many boxes of "16X65" shotshells really contain hulls with 67mm lengths, maybe even a bit longer. I see this mostly with ammo from Britian.


This is the case with allmost all makers.....

The historical reasons for this is that people reloaded shells in those days, each time the cartridge was fired and reloaded the shell was lengthend somewhat, so a shell that started of as a 65mm shell could end up 67 or 68mm long. So most makers did not stick to 65mm - they used 67 or 68mm to be sure. If the buyer didnt specify a shorter chamber. That extra space is what the manufacturer have used when they left the overwad and had to cut the available volume in the shell for the folding.

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Snart ska jag leta upp artikl'n i vapentidningen som du skrev om detta. Säkert ska det vara interesant att läsa den! Kanska då kommer jag att förstå bättre varför dina och mina erfarenhet skiljar sig så mycket.

Hej då,
Niklas


Skicka ett mail till Tobias@shotguns.se så kommer den som en PDF...

Best regards
Tobias