@Tim Xman Even so, I don't think he surpass his power when he was full. Hashirama subdued Kurama when he was full and boosted by Madara's Susanoo.
It should be noted that Hashirama's Wood Release was designed specifically to defeat the Tailed Beasts.
An example is when Madara used his Wood Release: Wood-Dragon Technique against Naruto, blocking him easily.