In our M48 tanks we carried 6000 rounds for the Browning .30 co-ax mounted in the turret of our tanks, with around twice that in ammo cans for reloads or topups as the day/s went on.
We only carried around 1000 rounds- about 10 ammo cans worth- for the tank commander's .50 M2, with maybe another five cans or thereabouts for reloads. There were a couple of reasons for that.
But the main one was: with a .50 that was all we needed.
Ma Deuce shot the Luftwaffe out of the sky. Thank you for your service.