Lessons Learned from the Rus - Ukr war

[Suhiir]

Most times artillery ammo is not sufficient to lay down a rolling barrage for the last couple km prior to contact with the expected opposition main line of resistance.

Artillery in generally used where you know, or VERY strongly suspect the the opposition is. That usually means you've spotted them with scouts/UAVs or taken fire from a position.

Now something like a pre-planned offensive you've spent months preparing for, sure, you've had time to stockpile trainloads of artillery ammo.