Forum:Maximum experience per game

SO, I just completed the game a second time on hardcore and was hoping to get to level 60. I made it to 57 doing every single mission including team member missions, background missions, and Bring Down the Sky. I killed everyone without using the Mako, collected all survey items, data discs, etc. even those exceeding the required amount, I opened every single container, I killed as many Geth as would respawn on all missions that involved taking down a dropship, and while I did resolve a few situations diplomatically with intimidate I usually tried to avoid doing so to maximize the amount of enemies available to kill. I believe I should have had the additional 5% experience bonus because my first time through I got to level 50. I did not save becoming a Spectre until late, as I wanted to get the Liara achievement during this game and I didn't pay that much attention to trying to get small amounts of XP near the end of a level.

Did anyone manage to do better? Is it possible to get to level 60 in one playthrough without the experience bonus from having been to 60 once already?