When do I send my scores

Ok I am very confused. I have a 1600 on my sat and I am taking it one more time in November, hoping to go way up. I am only applying to big public universities and don’t know if I should send my current scores or not. I have been told that the submission process is almost machine ran at these huge schools and they wont look at more scores if you send them in after your original. I really want them to see my best so I am not sure if i should submit my apps now or in mid November. I was hoping to apply early for one or two and everything is complete besides my scores, what should I do?