Let's play guess the cartridge.

[Bfh_auto]

1) It was used by a military.
2) It penetrates 2.5" of dry pine board.
3)

 

[Riomouse911]

.45/70?

 

[NIGHTLORD40K]

.30 carbine? Kinda tough without a sense of scale.

 

[Jim Watson]

.30 Nagant revolver.

 

[bassjam]

Need banana for scale.

 

[WrongHanded]

That seems to be a very small rim for the case size.

Is the jacketed bullet correct to the time period in which it served as a military cartridge?

 

[Jim Watson]

Did a military ever use .22 Velo Dog? 2.5" of boards isn't much penetration.

 

[Legionnaire]

Not .30 Carbine; it has a rim. That was my first thought, too.

Proportion of length to caliber looks too long for a 12.7x44R .

 

[Speedo66]

.38 long Colt?

 

[Bfh_auto]

.30 Nagant revolver.

Yes it is.

 

[Dain Bramage]

Would that be an African or European pine board?

 

[Bfh_auto]

That seems to be a very small rim for the case size.

Is the jacketed bullet correct to the time period in which it served as a military cartridge?

It's a military surplus cartridge.

 

[Bfh_auto]

Would that be an African or European pine board?

Yellow pine dried for 5 years

 

[Bfh_auto]

Did a military ever use .22 Velo Dog? 2.5" of boards isn't much penetration.

For reference a 7.62x25 penetrates 5 inches of the same boards and it will defeat some body armor.

 

[Jim Watson]

The old US test was the number of 7/8" soft pine boards. The standard setup was a "baffle box" with the boards spaced apart for splinters to be blown clear of the bullet track.
Tested that way, .30 Mauser penetrated 11 boards, 9 1/2" of wood.

 

[Legionnaire]

Cool cartridge. Had to look it up.

 

[theotherwaldo]

The crease at the lip of the cartridge was a bit of a hint.

 

[Bfh_auto]

The old US test was the number of 7/8" soft pine boards. The standard setup was a "baffle box" with the boards spaced apart for splinters to be blown clear of the bullet track.
Tested that way, .30 Mauser penetrated 11 boards, 9 1/2" of wood.

These are rough sawn air dried pine. They are not soft and are thicker than dimensional lumber.

 

[Bfh_auto]

.30 carbine? Kinda tough without a sense of scale.

I actually use 30 carbine dies to reload them.
The size, length and bullet weight are almost identical.

 

[Nasty Canasta]

I was going to guess 351 Winchester

 

[NIGHTLORD40K]

.30 Pedersen?

 

[jonnyc]

I'll play!
Hint: Very rare 1950s assault rifle experimental, from an unexpected country.

 

[Bfh_auto]

I'll play!
Hint: Very rare 1950s assault rifle experimental, from an unexpected country.

I think it's the 7.95x33 kurtz

 

[NIGHTLORD40K]

I think it's the 7.95x33 kurtz

Which would make it a '40s cartridge. Heck, the headstamp is '45.....

 

[Bfh_auto]

Which would make it a '40s cartridge. Heck, the headstamp is '45.....

It was for the STG44. So the timeline would be correct.
I'm not sure I'm right. But I'm betting the odds..