Russia definitely has been constrained on artillery munitions, which is why they (a) rationed shell use and (b) went to North Korea for more.
They will not run out of any sort of munition that they can still produce or otherwise obtain. It just means that their rate of use will be forced down from the high, unsustainable rate where they were consuming stockpiles to a lower rate bounded by what can be produced.
Russia definitely has been constrained on artillery munitions, which is why they (a) rationed shell use and (b) went to North Korea for more.
They will not run out of any sort of munition that they can still produce or otherwise obtain. It just means that their rate of use will be forced down from the high, unsustainable rate where they were consuming stockpiles to a lower rate bounded by what can be produced.