My mom has a very nice old drilling in 16x16 over something unknown. We have 4 cartridge cases that are in the trap door in the stock but they have no dimensional data on the headstamp. I was hoping sombody here could help me.
basics: straight wall, rimmed.
rim dia: .531
case head dia.: .467
case mouth dia.: .465
Rim thickness: .056
length: 2.024

The cartridge would be designated an 11.3 x 51R or 52R based on the sample cartridge dims, but I can't find any data on anything that matches these numbers.
The closest match is the 11.4 x 50R Werndl M73, but its diameters are larger than what we have by a significant amount;
rim diam.
Mom's: .5135", M73: .571"
case mouth
Mom's: .465", M73: .472"
case head dia
Mom's: .467", M73: .493"

The case mouth is an easy one to expalin and simply ingnore, but the rim dia. and the base dia.s are off enough to give me puase on a positive I.D.

Head stamp info: (slashes indicate marking at 180 degrees, they are not on the headstamp)
stamp 1: HUNTENDOERFFER / NURENBERG
stamp 2: B. STAHL / ST
stamp 3: B. STAHL / SUHL

Well there's everything I have. Anybody know what it is?

PS I have also put this post on the Cartridge Collectors Forum.

11.4x50Rmm Austrian Werndl

Rusty
A quick glance thru a couple of referances shows a couple of possibles, but they suffer from the same problems as the Werndal round.
There was a time when each gunmaker had their own "special" rounds, and no one elses version would fit (pre-standardization era).
I would suggest that you post the dimential data for your rounds (don't worry about posting the Werndl data) over at http://www.cartridgecollectors.org/f/forum.php (no regesteration required) and see if they can figgure it out. Those guys eat drink and breath obsolete and unusual cartridges.

Edit to add, you could probably make brass from the 444 Marlin case, if you decide to reload for it (rim is a maybe .004 to thick, and a little under diameter @ .511, but with a base dimention that's only .002 below yours it looks like a good candadate for doner brass)

Yup I noticed that too. There is only one problem, she holds onto that thing tighter'n a tick on a coonhound. I doubt highly if I'll get to shoot while she's still with us. With luck that will be some many many years yet.