I wonder if preloaded packed cartridges can be swapped in and out between volleys.
I believe the idea was to reload similar to MRL pods, but that's pretty slow for something that was pitched as a CIWS.
The claimed rate of fire for the Chinese Metal Storm gun (let's just give it a notional name of CMSG for ease of typing) is 450 thousand rounds per minute, with another claimed rate of fire of 7600 rounds per second. From what I understand about the original Metal Storm gun, depending on the configuration or model - The rounds stacked in every barrel can either be fired in selective bursts (i.e. not all at once), or all at once.
Do we know how many barrels are in the CMSG, and how many rounds can be loaded per barrel in the CMSG in one setting? There's also the consideration on the lengths of each round and of each barrel to ease estimation work.
If plenty enough rounds can be fired in such a short duration of time (e.g. around high-10k rounds to 100k-200k rounds per burst), it could result in enough enemy targets that are at close-in distances during the interception session being destroyed, such that the time for reloading the CMSG isn't as big of an issue before the next wave of enemy targets arrive close enough?
There is also the solution of having the CMSG paired with other conventional CIWS weapon types (e.g. gun-based, DEW-based or counter-UAV UAV-based platforms) to provide temporary cover while the CMSG's reloading process is ongoing.
Though, if one entire emptied CMSG module can be swapped with another pre-loaded CMSG module in one-go, then the reload duration shouldn't take too long.