You don’t need piles of unguided shells or hundreds of artillery tubes for that. Note that GPS guided shells (Excalibur) are useless on moving targets.
What you do need, other than guided weapons, is a blizzard of shells on invasion beaches for a few hours. That’s not going to draw down stockpiles. The whole thing is over and done in a couple of hours.
Hoo, golly, you’re way behind on the new Excalibur variants. Some are expressly designed for moving targets, like fast attack craft. GPS is old hat.
BUT. High losses from Chinese missile attacks can also be expected.