I don't need max ammo either but it does have an effect that affects me.
Each character gun has its' own sensitivity.
You're going to tell me that you've picked up another gun and haven't noticed the sensitivity change?
Marlowe's. That reload time sure is helpful.
Chloe's also has fast reload. Although to be honest, Scope Zoom on an M9.... not helpful if I can snipe with Marlowe's anyway.