Kynoch 50 cal id please

[SG500]

Way outside my collecting area, a friend gave me this.
Could anyone help with the interpretation of the head stamp please?
Kynoch
1970
But what does the rest mean?
Thanks in advance.
Dave.

 

[justin]

Dave, MG Observing XL13E1 is the experimental version of the tank ranging cartridge, the L13A1. The bullets for the experimental version varied in weight until being settled on at 965 grains.

 

[SG500]

Thanks Justin, useful information.

Dave.

 

[glevum]

Dave, there is some more information on this thread

12.7x99mm NATO - .50 BMG Rounds

Here is my collection of 12.7x99mm NATO .50 BMG rounds. I was wondering if anybody could identify the Country, Manufacturer, Projectile and Usage? Is there a good book or website that could give me this information? Round 1 Headstamp: L C 4 Projectile: Silver Tipped, Copper with Steel Core...

www.bocn.co.uk