In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.
Help ID found case
dtknowles
Member Posts: 810 ✭✭✭✭
I found a piece of brass at the range that I can't identify and it has interesting features. It is a rimless 8 mm cartridge that is longer and bigger in diameter than .308. The rim (I know I said rimless but you know what I mean) is more substantial than other cartridges. The headstamp starting at 12 o'clock is a 5 -- at 9 o'clock is a D -- at 7 o'clock is a 7 -- at 6 o'clock is a 9 -- at 4 o'clock is a 2 (792 maybe 8 mm.?) and at 3 o'clock is a T
The case is:
2.191 inches long
0.496 inches diameter at the rim
0.495 inches diameter at the head
0.475 inches diameter at the shoulder
Neck is 0.321 inches long
Rim is 0.060 inches thick
Thanks
Tim
The case is:
2.191 inches long
0.496 inches diameter at the rim
0.495 inches diameter at the head
0.475 inches diameter at the shoulder
Neck is 0.321 inches long
Rim is 0.060 inches thick
Thanks
Tim
Comments
7.5 x 55 Swiss (GP11)
http://stevespages.com/jpg/cd75x55schmidtrubin.jpg
http://www.swissrifles.com/ammo/#7.5
Best.
Thanks for the interest.
Tim
Tim
It is basically a short action 30-06 by volume. The case design is very similar to the .284 Win. or the more current 6.5 x 284 Norma.
Best.
Damn you guys are sharp.
How about this:
The above headstamp should match except for the three digits at the bottom instead of two digits at the bottom.
"T" (at 3 o'clock) is the ordinance factory which is Munitionsfabrik Thun, Thun, Switzerland.
"D" (at 9 o'clock) is the brass case manufacturer which is Dornach.
"5" (at 12 o'clock) is the month of manufacture.
"792" (at 6 o'clock) This is where it gets interesting. The usual Swiss headstamp has a two digit code for the year of manufacture at 6 o'clock. It is not unusual to see variations like this but I do not know what the three digit code means. Maybe it has to do with the type of load and/or powder?
Regards,
Heavyiron
"
Tim
I understood what you meant but it doesn't change the interpretation.
The headstamp of the cartridge in question is a variant of the common four element Swiss headstamp, but headstamp variants are known to exist for this cartridge and are not uncommon. Without a key to explain the meaning of the additional elements it is just speculation. My guess is the two digits "79" are the year of manufacture, but there is no definition for the third digit "2". However, this is just a guess.
Regards,
Heavyiron