Help me identify this round

[deemus]

I have a few cases that I can't identify. This case is virtually identical to a 30-06 case. In fact, they were mixed in with some 06 cases.

The headstamp says "DEN" and "42" on it

The case is basically the same length as a 06, but the case mouth is noticeably larger.

I have no clue what this is.

 

[Southpaw]

Looks like you weren't the first to ask this question:

https://www.google.com/webhp?hl=en&tab=ww#hl=en&q=headstamp den 42

 

[GlockOwner]

WWII denver ordinance ammo for a m2 garand from what my google skills tell me

 

[deemus]

Well, it ain't 30-06. Mouth is way too big for 06. Somebody must have made something else out of those cases. I will measure tonight, but its got to be close to .40.

 

[AMERICANTARGETS741776]

by the sounds of it , it could be the .35 whelen. or the 9.3x62

 

[Moonpie]

My guess is its a home made case made into an 8mm x 06.
Converting 8 x 57mm rifles into 8mm x 06 was popular in the years after World War Twice as 8mm rifle ammo wasn't easy to get.

there is also the possibility it is a 333 OKH, .338/06, or even a 400 Whelen if the bullet diameter is as large as you say.

 

[deemus]

My guess is its a home made case made into an 8mm x 06.
Converting 8 x 57mm rifles into 8mm x 06 was popular in the years after World War Twice as 8mm rifle ammo wasn't easy to get.

there is also the possibility it is a 333 OKH, .338/06, or even a 400 Whelen if the bullet diameter is as large as you say.

I found the inch equivalent and will measure it. 8mm x 06 could be the winner. Its def the same size case as 30-06, but with a bigger mouth. 8mm = .323

Nice article about the round here:

http://www.reloadbench.com/cartridges/w8mm06.html

 

[deemus]

And..... Boom goes the dynamite. Good call on the 8mm x 06. .323 diameter.

 

[deemus]

35 Whelen is the winner, per Robocop.