Who can help identify this chamber casting?

[2meterB]

Was expecting 300 savage, but easily ruled that out.

(This is from a rechambered Arisaka)



Pictured next to .308. Cartridge shoulder is wrong for .308 (But so damn close.)

Head to shoulder 1.4
Shoulder length: .1
Neck length: .35
Overall: 1.85
case diameter: .46
neck diameter: .342
bore: .311

The only thing I found even close is 30 TC. Any ideas?

[Carcassonne]

.


300 savage

page 60 here: http://www.saami.org/specifications_...wnload/206.pdf

https://en.wikipedia.org/wiki/.300_Savage

.

[2meterB]

The 1.25 threw me off in my book.

[thenodnarb]

try 7.65 argentine