I think you might be getting a little confused by terminology. In military terms a round of ammunition doesn't necessarily describe just a small arms cartridge. It can be any munition that's stored for a long period until needed with minimal maintenance. So even an expensive missile or satellite might be treated as a round of ammunition, depending on the design and concept of operations.

Unless the satellite is meant to collide with another object, it's never going to be considered ammunition. It is a strategic platform for communication or intelligence gathering or maybe both. So calling a satellite ammunition is just belaboring the point for internet points or something.