These are the indicative estimates of Russia’s combat losses as of July 21, according to the Armed Forces of Ukraine. pic.twitter.com/RApZEHcRkg
250K by the end of the month?
Also, Russia does not seem to have an effective response to protect its artillery systems since Ukraine started upping its game in targeting them.
Russia has an ample supply of artillery though, some estimates put them in the 20k, My guess is Ukraine is testing how effectively Russia can replace destroyed artillery and the impacts that targeting the Russian logistic choke point (e.g. kerch bridge) can have on this, especially in the south.