499 on a random map in SOD.
By the way, I checked the physics guide, and there's an error there – the formula is described incorrectly:
(200 - something) and multiplied by a coefficient no greater than 2 - i.e., according to the physics guide, the maximum can be 400 :)
In reality, the maximum is 500. Offline players can easily achieve this maximum. If you're interested, I recommend playing 1-2 tournaments to improve your knowledge of the game, as very interesting discussions follow such tournaments. I recommend it! ;)