Amount Of Ammo in B-29

[tiger63]

How much gun ammo did a B-29 carry

[Hagar]

According to this site:
http://home.att.net/~jbaugher2/b29_3.html

Twelve 0.50-inch machine guns in four remotely-controlled turrets (two above and two below the fuselage) and in the tail, each with 1000 rounds of ammunition. In addition, early production blocks had a single rearward-firing 20-mm M2 Type B cannon with 100 rounds in the tail position. Later, two more guns were provided for the forward top turret.