The gun is missing its apfsds, apds, and ahead rounds.
The apfsds isn’t super important and I can understand why that would be left out but the ahead is the only way this thing will be able to reliably intercept ordinance or kill helis with ircm so it’s kinda important.
do you have a picture of the gun mounted on the boat.
Because the important part is the programmer and additional piece of equipment on the cannon that actualy programms the round. its place at the end of the barrel
do you have live footage of the ahead being tested? it might be the case that it cas been developed for a variant but china never actualy put it into service as well
round could be pre-programed in the chamber, the reason the german AHEAD uses muzzle devices is for max precision in airburst distance by adapting the time fuze to the muzzle velocity of each round. This is probably less of a problem on a gun firing 5000rpm+. The muzzle device may also have issues in the salt spray environment of the navy so they may have developed a system to program it in chamber instead.
Clearly here using AHED ammo, and Also note the ROF is around 5000 RPM+ closer to naval CIWS vs the current 3000 RPM. sounds and looks RPM wise closer to the AK-630M1