"Eighteen months later in late 2023, the Russians were shooting just 10,000 shells a day—and the Ukrainians, flush with a million South Korean shells the Americans had bought for them, roughly matched that firing rate."
https://www.forbes.com/sites/davidaxe/2024/02/15/three-million-shells-thats-how-much-more-artillery-ammo-russia-thinks-it-needs-to-defeat-ukraine/