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On my recent trip to the top end I came across a small market, and one of the stall holders was displaying these casings. I sat the small arms bullets beside them it for a size reference
Attachment 49839
The owner was trying to get information on the casings, and knew nothing about them. I am guessing they are post-war? Can someone please identify these casings and give us an indication of their use?

Hi Howard, they look like 30mm used in a Defa?? Mirage jet or similar.
Colin.

They are 25 mm bushmaster chain gun, mounted on the LAVs current use.

Howard,

I agree with Jason: 25mm cartridge cases and links fired from an M242, 25-mm chain gun as mounted in an ASLAV (or on RAN patrol vessels).

The link is the M28. It is a pressed steel two-piece link and only used with the 25-mm cartridges for the M242.

The cart cases are the C1030 steel case, annodized with a light olive green finish. The cart case has a characteristic groove around the circumference, a centimetre or so below the shoulder - it is just visible in your image.

As far as I know, the current projectiles available in Aust are the APDS-T (M791), HEI-T (M792), and the TP-T (M793). The cases shown could have been loaded with any of the above.

Mike C

Thank you Boys,
The information has been sent to the owner. I am sure that he is grateful.
Cheers
H