I had thought I would get my character a Reaction Cannon, light. I'm a bit confused about how ammunition & charges work. Page 177 says the RC has a capacity of 6 rounds usage 1. Page 168 says weapons using standard ammunition come pre-loaded. If I understand table 7-9 on 179 correctly, heavy rounds have 20 charges/cartridges. So the RC comes pre-loaded with 6 heavy rounds, each having 20 charges/cartridges. This means my character can fire it 120 times before needing to obtain more heavy rounds for it or can fire it 6 times because each use takes 1 round which is 20 charges/cartridges each time?