Brits floating munition? What happen to this forum
You are playing them wrong if ever wasting ammo on something outside mines/sweepers/sniper crit shot/commando grenades. Conserving ammo for op late game air strikes far more rewarding than any amount of weapons upgrades brits can possibly get.
Royal engies with 3 vickers drop them a lot, but, they are insanely powerful and insanely cheap to reinforce on top of that.
And dont forget about anvil arty, its crazy cost efficient for 50 ammo.