Riflemen have too much ammo

[hoplitis]

Mobhack referred to continuous firing which I assume includes OP firing during enemy turn.

So you have:
own turn: 6 FOPS
enemy turn: 6 FOPS (as OP fire)
game turn: 12 FOPS total

If available FOPS are 90 then you have 90/12 = 7.5 game turns firing constantly at maximum rate.

If a game turn is 2 min that is 15 min battle time.

If a game turn is 3 min then it is ~23 min battle time.

If I haven't done anything completely stupid, let's agree on the numbers and go on with the discussion.