I skimmed that and now believe it is way more than 300k, but it would still not be three huge dumps of 300k+ which should be very noticeable on the graph. That also mentions almost 800k votes lost so perhaps people are defining the fraud differently.
https://www.americanthinker.com/articles/2020/11/its_in_the_code_hankypanky_in_virginias_votes.html
I skimmed that and now believe it is way more than 300k, but it would still not be three huge dumps of 300k+ which should be very noticeable on the graph. That also mentions almost 800k votes lost so perhaps people are defining the fraud differently.