For my take on the IK setting I created the following new weapon quality:
Ammo (#): The weapon is loaded with this many shots/uses. When empty, it gains the Load (1/3rd Ammo) quality. Example: The Cygnarian sentinel's Chaingun has Ammo (12). This means that after it has expended its 12 shots (of belted ammunition), it acquires the Load 4 quality to represent loading a fresh belt.
I don' tthink its a good idea to formulaicly tie the load number to the the ammo count.
I'd also like to avoid cluttering the tables with an additional word/quality, especially if they are always going to work in pairs anyway.
Single Mode (named trick): When the named trick can be applied to an action with the weapon, it must be, before any other tricks are applied (if applicable).
You can only use one trick per action, so that's pretty much the end of the story right there. I'd definitely phrase that differently.