Please help I.D. this round.

[Steppenwolf]

Please help I.D. this round. Ignore spray paint, not I.

Bullet dia. .430
neck dia. .463
shoud dia. .530
base dia. .528
rim dia. .655
rim thick. .083
case leng. 2.215
cart. leng. 2.944

 

[Noel]

Is it rimfire or center fire?

Looks like a .22 Hornet on steroids what ever it is!

Noel

 

[SDC]

Any sort of a headstamp? There are several it MIGHT be, given manufacturing tolerances:
10.75x 58R Russian Berdan
a short-necked 11mm Murata
43 Spanish Remington
11mm Gras

 

[6.5x55swm]

Interesting, the only cartridge that comes close is a 10.75mm Russian Berdan

 

[Hitzy]

What about the 11x60R? Original 1871 mauser round......

 

[BEARMAN]

The 11 mm Mauser has a much different rim and usually a flat point bullet, but not always.

 

[Steppenwolf]

It is a centre fire cartridge marked, A opposed by 72 or 78, 3 opposed by 9.

 

[green]

Looks like a 11x57R Spanish made Remington ctg loaded with a FMJ bt. Round is shown in "History and Development of Small Arms Ammunition Vol2" Hoyem. Similar round is the 11.4x57R Spanish. When US soldiers captured these in 1898 they called them "poison bullets" due to the verdigris on the bullets. Used in Remington rolling block rifles.