This is one of the best sites for following the ACTUAL (as opposed to the incessant misleading propaganda from both sides) changing tactical situation on the ground in Ukraine. For in depth analysis of selected topics, Aussie 
is very good.
Here is his look at artillery ammunition supply. Ammunition shortages in Ukraine - production, supply, & are Russia or the West running dry? His conclusions is that both sides should have, if not as much as they want, lots, for at least another year. People fixate on 155mm, which is Ukraine's best artillery, and how much the US will be able to supply. But most of Ukraine's artillery is not 155mm, and the Czech Republic and Spain alone have greater 155mm production capacity than the US.
Lots of other nations are ramping up production. South Korea has, apparently, a whole lot more 155mm than the US had when the war began, and although not prepared to ship 155mm to Ukraine, the South Koreans are sending the US 155mm, which allow the US to keep drawing down its domestically produced stocks, without reducing the amount of 155mm it holds. Oh, and the US apparently has a couple of million 155mm cluster shells that are not counted as part of our inventory, because Obama began phasing them out. It would cause a great deal of bedwetting among EU types, who have agreed to give up cluster munitions, but we could, in a pinch, ship them to the Ukes.
The Russians have increased production of new shells, and are attempting to really increase refurbishment of Brezhnev era artillery shells, by replacing the fuses and bursting charges. They may be presumed to be attempting to repatriate some of the millions of artillery shells they sold, or gave, to third world hell holes in the 60s-90s, and may be seeking NORK shells.
Armed Forces of the Russian Federation continue the special military operation.
In Kupyansk direction, Ground-Assault and Army Aviation, as well as the artillery of the Western Military District have neutralised the concentrations of manpower of the units from 14th and 92nd mechanised brigades of the Armed Forces of Ukraine (AFU) near Dvurechnaya, Gryanikovka (Kharkov region), Novosyolovskoye, and northern outskirts of Stelmakhovka (Lugansk People’s Republic).
Over 50 Ukrainian personnel, one motor vehicle, and one pickup have been eliminated.
In Krasny Liman direction, the strikes launched by Operational-Tactical and Army Aviation, as well as the artillery of the Central Military District and Airborne Troops have resulted in the neutralisation of the units from 92nd Mechanised Brigade of the AFU near Stelmakhovka, 95th, 80th airborne assault brigades of the AFU, and 125th Territorial Defence Brigade near Chervonaya Dibrova (Lugansk People’s Republic), Serebryanskoye forestry, and Yampolovka (Donetsk People’s Republic).
Over 80 Ukrainian personnel, one infantry fighting vehicle, five armoured fighting vehicles, and one pickup have been eliminated.
Two U.S.-manufactured counterbattery warfare radars (AN/TPQ and AN/TPQ-37) have been destroyed near Vishnyovoye (Donetsk People’s Republic), and Nevskoye (Lugansk People’s Republic).
In Donetsk direction, units of the Southern Military District, and volunteers from assault detachments continued their successful offensive operation, and neutralised the AFU units near Razdolovka, Blagodatnoye, Krasnopolye, and Severnoye (Donetsk People’s Republic).
One AFU ordnance depot has been destroyed near Antonovka (Donetsk People’s Republic).
Over 80 Ukrainian personnel, three armoured fighting vehicles, two motor vehicles, and one D-30 howitzer have been eliminated.
In Zaporozhye direction, offensive operations conducted by the units of the Eastern Military District have resulted in taking more advantageous lines and positions.
Up to 85 Ukrainian personnel, one infantry fighting vehicle, two armoured fighting vehicles, one pickup, two D-20 howitzers have been eliminated near Stepnogorsk (Zaporozhye region), and Prechistovka (Donetsk People’s Republic), as well as one D-30 howitzer near Preobrazhenka (Zaporozhye region).
One AFU ordnance depot has been destroyed near Malinovka (Zaporozhye region).
In Kherson direction, one U.S.-manufactured AN/TPQ-36 counterbattery warfare radar has been destroyed near Sadovoye (Kherson region).
Operational-Tactical Aviation, Missile Troops and Artillery of the Armed Forces of the Russian Federation have neutralised the command post of 128th Mountain Assault Brigade of the AFU near Lezhino (Zaporozhye region), as well as 74 AFU artillery units at their firing positions, manpower and hardware in 119 areas.
Russian air defence facilities have shot down one Su-25 airplane of Ukrainian Air Force near Antonovka (Donetsk People’s Republic).
Nine Ukrainian unmanned aerial vehicles have been destroyed near Zmiyevka, Vladimirovka, Krasnorechenskoye, Yagodnoye (Lugansk People’s Republic), Urozhaynoye, Novomayorskoye (Donetsk People’s Republic), Priyutnoye (Zaporozhye region), and Ochakovskoye (Kherson region).
Two rocket-propelled projectiles launched by U.S.-manufactured HIMARS multiple-launch rocket systems have been shot down near Rabotino and Molochansk (Zaporozhye region).
One U.S.-manufactured HARM anti-radiation missile has been intercepted near Stepnogorsk (Zaporozhye region).
In total, 376 airplanes and 203 helicopters, 2,931 unmanned aerial vehicles, 401 air defence missile systems, 7,601 tanks and other armoured fighting vehicles, 985 fighting vehicles equipped with MLRS, 3,887 field artillery cannons and mortars, as well as 8,144 special military motor vehicles have been since the beginning of the special military operation.
