[I don’t believe estimates of the Russians firing 50K shells per day, on a sustained basis. Maybe they massed fires like that for some peak at some point.]
https://encyclopedia.1914-1918-online.net/article/artillery
That averages out to 150K shells a day. 1/3 of that doesn’t seem like much of a stretch for a 21st century economy with a much bigger surplus (beyond subsistence) than Germany’s a century ago.
“That averages out to 150K shells a day (Germany in WWII). 1/3 of that doesn’t seem like much of a stretch for a 21st century economy”
But that was for an army of millions. The Russian forces in the Ukraine are more like 150K.
A Battalion Tactical Group has six howitzers. They have about 40 BTGs that were actively engaged in the Donbas - about 240 tubes. Every one would have to fire a couple of hundred rounds per day for them to fire 50,000 in a day. The barrels would need to be replaced about every other week.
I just doubt that they are are sustaining that rate of fire, for maintenance, as well as supply reasons, as well as personnel reasons. That would be humping ten tons of shells every day, for every gun crew.
I could see them possibly peaking for a particular operation, but not coordinating hundreds of crews doing that every day.