Canadian range find rimless gun case?

[BMG50]

Found this at the back of my house on a range area that use to be occupied by the Canadians during WW2. Apart from the enormouse amount of .303 .45 and 9mm rounds and cases found, i found two of these pictured, which appear to be the metal base of a 12 gauge round and about the right size but there is no rim for extraction and the thickness of the metal casing is much thicker than a normal 12 gauge round. There are no markings but very slight marked rings around the edge. It seems to be something that would set off or fire a larger thing, say part of a mortar round. I had a spigot mortar in mind. Any ideas or any one know what they are?

 

[25thapril]

Not 100% sure but could it be a charge from a PIAT ? just guessing but they do look similar Regards Daryl

 

[hangarman]

Hi BMG50,
The carts are half of the recocking cartridge from a PIAT round. The other half stays with the piat round until the round hits its target then fires the top half of the cartridge back to the firer (not that its designed to do this, its just a quirk of the design) Same idea as the Spigot mortar so you were on the right lines.
Cheers
Gary

 

[siegfreid]

Chris . They are as Daryl said , PIAT discharge cartridge bases . Mike.

 

[BMG50]

Thanks Guy's very intresting that these were found and used at this location.

 

[smle2009]

I often turn these up on and old grenade range....probably used with the sub calibre practice round,post number 8 shows a great photo of one.
http://www.bocn.co.uk/vbforum/threads/3637-PIAT-Projector-Infantry-Anti-Tank?highlight=piat+practice+round

 

[TimG]

Nice x-section of the cartridge -

http://cartridgecollectors.org/cmo/cmo06aug.htm

TimG