The RMK-30 autocannon employed a front loading revolving chamber to shorten the gun and used caseless 30mm ammunition; developed in the 1990’s. Apparently the high cost of manufacturing ammunition among other things resulted in the cancelation of the RMK-30 around 2010
Here are a couple of links pertaining to the RMK-30
Simplified diagram showing the loading of cartridges into a front loading cylinder:
Simplified diagram of the revolving cylinder:
Here is a BOCN thread showing a factory mockup of a RMK 30 cartridge http://www.bocn.co.uk/vbforum/threads/65987-RMK-30-Rheinmetall-Mauser
Can anyone provide a photo of an actual RMK-30 30x250mm caseless cartridge?