FWWC and artillery ammo consumption

[Amadeus]

Zuber says that the "Marne miracle" was more the result of the French stopping cold the Germans with an unprecedented deluge of artillery fire, than of having them outmanoeuvred at the strategic or operational level.
Ian Summer, in his "The first battle of the Marne 1914", writes that the French army had 530,000 rounds of 75mm ammunition available at mobilization, by 5 September stocks had fallen to 465,000 and only 33,000 remained by 10 September!

Now, even allowing for the unaccounted production of 75mm artillery ammunition during August (i.e. the fact that the stocks dropped by 65,000 units in one month does not mean that from the beginning of August 1914 to the beginning of September 1914, only 65,000 75mm round were expended) it's surely worth noting that in less than one week in September, the French army expended way more than 400,000 artillery rounds, an expenditure maybe an order of magnitude more than what was the norm in the preceding weeks.

I wonder whether this dramatically increased artillery ammo expenditure might be recreated in France '14 with the already available game features (a French Army that is more static and nearer to its supply sources should have fewer artillery units low on ammo and should have more occasions to fire at the enemy) or something new should be considered (e.g. variable stockpiling percentages for the Allies).

Comments?