Why replace it Aslain? Loading a round is separate from firing. Generally, the gunner, loader, and TC talk to each other so they are aware of where they are in the process. When I qualified as a gunner on a M60A3, we had a procedure that went something like this.
TC - Target at...
Gunner - Identified
TC - Load Sabot
Loader - Round up
Gunner - Target identified and locked
TC - Fire
Gunner - On the way (105mm - Kaboom)
Gunner - Target destroyed
TC - Next target at... (rinse and repeat)
That's from memory 30 plus years ago. However, I believe that if you could include 'On the Way' and maybe 'Target Identified' (when maybe you select auto-target on the target) would in fact improve the immersion of the game.
You have 'round up' after load, why couldn't you have 'on the way' when you fire, and target identified when you select auto-target? That certainly would make things cool and your mod pack even better than those on the street now. :)
Just a suggestion...but I'd love it for sure. :D