How much ammo do you carry?

Heavy with light = Heavy 240 - 300 + Light 180 - 240 depending on backpack size

Energy with heavy = energy 300 - 450 + Heavy 180 - 240 depending on backpack size

Shotgun ammo 2 stacks of 16

Sniper ammo 3 stacks of 16

All Heavy = 400

All Light = 400 - 460 sometimes 500 {depending on if I have R-99 or not}

All Energy = 500 - 600 {it's hard to find in later games sometimes}