20mm/50cal ID help

[jestertoo]

Says French, head is same dimensions as hs404 20x110 but it’s shorter. No headstamps.

[jestertoo]

Found this, but this was for a 20x102 necked down

50 Cal/20mm HV Experimental

What is the correct name for this cartridge? I think I saw a FMJ projectile in a similar case called a Uniroyal experimental. I can find no links for Uniroyal making ammo since Eau Claire in WW2. What year was this item made? (1980’s?) It looks like a 20mm M103 necked to 12.7mm then a .30 AP black tip projectile in a clear sabot. No headstamp. Electric primed. 32mm Projectile length as shown above mouth. Any info on weapon type, use or history will be appreciated. [DSCN8188][DSCN8191]

[bdgreen]

Some possible information-

.50x110mm?

Perhaps I should not poke my nose in here but here is my opinion. These are the cartridges that I have in my collection that are about 50 cal and “about” 110mm. [image] A true 50x110mm, or more accuratly 12.7x110 French XPL. It was always thought that this case type was only used for velocity tests but then some appeared with machine gun links so a weapon seems to have been developed for it. Known without headstamp and with “20 MM LUM-1-79”. Based on the Hispano Suiza case. The 50 HV based …

The photo missing from Will’s post:

French 12.7 X 110mm: http://www.bocn.co.uk/vbforum/french-12-7-t44694.html

Brian

[jestertoo]

Thanks!

Logged it as
12.7x110 French XPL - .50 based on 20x110 H-S case