trying to identify a 20 mm cartridge case

[vstarclassic]

Hello Gentleman,
I just found a Valcartier Industry 20mm case , 97 mm long , rimless ,marked C68, straight case. Google cant help. Any ideas. G

 

[buzzmagoo]

Pictures would be a big help. Does it have a extractor rim? What type of primer ? It could be a flair casing of some sort as well.

 

[Jesus.C]

Might be a casing from a m242 bushmaster. usually mount on canadian Lav.

 

[vstarclassic]

Thanks for the reply, it uses a boxer primer andd definitely a straight case no rebate on the rim (same diameter as the case) Same length as a 50 cal and Valcartier made.

 

[vstarclassic]

Drop emails to gskenney1@yahoo.com and I'll send pics

 

[CV32]

Might be a casing from a m242 bushmaster. usually mount on canadian Lav.

The M242 is a 25x137mm weapon.

 

[CV32]

Hello Gentleman, I just found a Valcartier Industry 20mm case , 97 mm long , rimless ,marked C68, straight case. Google cant help. Any ideas. G

There are some quite old 20mm cartridges that are straight walled, but most are foreign and the dimensions and reference to a Valcartier (IVI?) C68 stamp are odd.

Pics would certainly help.

Without them, I'd hazard a guess that the cartridge case has been necked up to 20mm (perhaps from 0.50 cal?) or possibly a sub calibre round.

 

[vstarclassic]

The case is the same demensions as a 50 cal except the neck of course, so that would make sense.It also has a dye or red line about 3/4 of an inch and another about 1 3/4 inch down the inside of the case. I have six of these cases so its not a one off and the primers have been fired off. The firing pin dent is massive about 3/16 of an inch across. 37patt identifies it as a EOD disrupter round. I think that is what it is. Thanks for the replies.

 

[buzzmagoo]

A possible sub calibre canon/artillery blank.
I have several as well

 

[fingers284]

The case is the same demensions as a 50 cal except the neck of course, so that would make sense.It also has a dye or red line about 3/4 of an inch and another about 1 3/4 inch down the inside of the case. I have six of these cases so its not a one off and the primers have been fired off. The firing pin dent is massive about 3/16 of an inch across. 37patt identifies it as a EOD disrupter round. I think that is what it is. Thanks for the replies.

I'm curious to the reference of the "massive firing pin dent" where as 37patt claims that they were electrically fired.

 

[CV32]

I'm curious to the reference of the "massive firing pin dent" where as 37patt claims that they were electrically fired.

Good point. There is still a contact mark on an electrically fired primer, but it should not be a "massive" dent.

 

[buzzmagoo]

So I got to digging around and found something that fits your description.
Mine is aC-67 saluting cannon blank
IVI 89 . It has the same extractor grove as a 50 bmg it has a red varnish sealer over the blank charge aboute an inch from the top .
No.2
IVI C67 80 fired case .the primer strike has cratered to the formation of the bolt face and firing pin hole.
No3
IVI 06 HAS A RIMMED CASE NEW UN PRIMED.
No 4
F.N.B 82 .50 new un fired case . The primer pocket flame hole is not drilled. The extractor rim looks a lot like a rim fire ( rounded over ).
They are all the same length and dimensions ( other than thier extractor types) .