captive piston ctge from Slovac origin (I think !!!)
The bottom part of the case is in white plastic (L = 34.7 mm)
The top part of the case is in aluminium (L= 6 mm)
case diameter : 11.45 mm (plastic and aluminium)
case length : 40.7 mm
The exit hole is 6 mm but it is going decreasing.
Therefore I think the hollow point bullet has a diameter of less than 4 mm