[Itse]

A thing in this war has been civilians buying satellite imagery and using those to publicly track the Russian stockpiles. (Which is kind of crazy when you think about it.)

The most recent count of the Russian artillery stockpile says that Russia has activated or burned through about 1/2 of it's towed artillery stockpile and 1/3 of it's self propelled artillery stockpile. Which is a really significant rate, but they're not yet close to running out... yet.

That towed artillery number is starting to get interesting though. Based on the satellite imagery, Russia has been emptying their stockpile with a basic Last-In-First-Out system. That means each batch they bring out is older than the previous one.

The video I linked says Russia is not running out of artillery any time soon, but I'm not so sure.

That stockpile lasts for maybe a year and a half, assuming they keep burning through them at the same pace. That in itseld is not forever. However as the batches are getting older, a smaller percentage of them is likely to be useable, and the ones that are going to be usable are going to last less. Which would mean that even if they lose equipment at the same pace, they'll likely be burning throug the stockpile at a constantly increasing pace. So if the heavy fighting continues, we could be starting to see shortages as early as this year. (Or hypothetically any day now for all we know.)

Since Russia relies very heavily on sheer volume of artillery fire in everything they do, lack of artillery would be a huge deal for them. (They also use barrels from those towed artillery guns as spare parts for self-propelled artillery.)