CTA (Case Telescoped Ammunition) is where the projectile is completely contained in the cartridge case, together with the propellant. There are several reasons for trying to do this including space and weight saving.
The photographs shows a 30 X 165 AMCAWS (Army Material Command Automatic Weapons System) case. The projectile (sadly missing) would sit inside the case and looks similar to a GAU 8 projectile (if it different but I won't go into that here).
The unusual thing about this case is that the rim is 50.91mm compared to the mouth that is 54.84mm. The reason for this is because it is because it is designed for front loading - there are others out there like this such as the 23 X 260 Rikhter R-23 aircraft cannon.
Unfortunately the AMCAWS didn't work too well so development work was stopped.
The photos show the case next to a 30 X 170 Rarden, a picture of the base and a close up of the writing on the side of the case that says:
AMC - 30mm C/C
Target Practice
Hercules Incorporated
Lot X01 - Aug 1972
The photographs shows a 30 X 165 AMCAWS (Army Material Command Automatic Weapons System) case. The projectile (sadly missing) would sit inside the case and looks similar to a GAU 8 projectile (if it different but I won't go into that here).
The unusual thing about this case is that the rim is 50.91mm compared to the mouth that is 54.84mm. The reason for this is because it is because it is designed for front loading - there are others out there like this such as the 23 X 260 Rikhter R-23 aircraft cannon.
Unfortunately the AMCAWS didn't work too well so development work was stopped.
The photos show the case next to a 30 X 170 Rarden, a picture of the base and a close up of the writing on the side of the case that says:
AMC - 30mm C/C
Target Practice
Hercules Incorporated
Lot X01 - Aug 1972