it's mindboggling how vastly the Ukrainians have degraded RU artillery. If you watch the daily results, it's 20-40 tubes/mlrs launchers per DAY. And though the Russians had ample soviet leftovers to pick through, I suspect those have been used up. Further, the specialized metallurgy required to make the special steel alloys needed for tube arty is currently something the russians don't have internal production for. They can get more from NK and CN but they'll have to pay top dollar for 'em, and they'll probably be shitty (see NK artillery round quality lol)