Had to look up their magazine size: 350 rounds is what they carry according to Wikipedia. Doesn't sound like a lot but it's a large exploding shell and the system has a high level of accuracy. I remember early on there was a report it was downing a drone in 5-7 rounds. So one maganize can neutralize around 50 drones or more. They can also intercept cruise missiles.

These are ideal for the protection of critical objectives as a last line of defense. Every one of them they get is a big addition.