The mobilization order is so pointless that I am left wondering who in Moscow thought it might be a good idea. It was a decision guaranteed to generate massive protests for no apparent military benefit. There is no way for the poorly supplied and corrupt Russian military to train, house, clothe, and arm 300,000 men anytime soon, and certainly not before winter arrives.
In reality, Putin doesn’t even have 300,000 men; he has roughly 300,000 names of male Russian citizens, many of whom will never set foot on a military base. As a strategic matter, this measure is pure idiocy.