I don’t think it can be known now more than 85 years after-the-fact. Byt Häyhä was a good shot with a rifle and also a squad leader issued with a submachine gun, using the Suomi KP/-31 with a firerate of 750-900 rounds a minute would rip an enemy to shreds in suitable ranges. So a combination of fact and fiction (propaganda) will lead to such a number. I personally am not sure if I believe everything they tell us.
I don’t think it can be known now more than 85 years after-the-fact. Byt Häyhä was a good shot with a rifle and also a squad leader issued with a submachine gun, using the Suomi KP/-31 with a firerate of 750-900 rounds a minute would rip an enemy to shreds in suitable ranges. So a combination of fact and fiction (propaganda) will lead to such a number. I personally am not sure if I believe everything they tell us.