Help with unknown Royal Laboratory cartridge dated 1918


#1

Have been unable to find this inert cartridge in any of my searches, therefore; would be grateful for any help with identification.

Headstamp appears to indicate:
Royal Laboratory 1918

No magnetic attraction.
Three distinct neck crimps.
Semi-rimmed.

Measurements are as follows:

Case: 2.446"
Bullet (that can be measured): 0.30
Rim: 0.534
Base: 0.503
Neck: 0.341
Total Length: 3.04

Sam3


#2

Experimental .303 Rimless, I’ll grab a link to some more information in a sec for you.

Chambered in P14 rifles for the British Army and in Lewis Guns for the RAF.


#3

Here is the link.

Pretty cool round. Nice addition to ones collection.


#4

Hi Guin,
Many thanks for your rapid response…greatly appreciated!

This IAA Forum is truly outstanding.

Thanks again & regards,
Sam3


#5

Often called a “.303 Lewis Experimental”.


#6

Many thanks.
Sam3