I did 475 for one rep in a powerlifting competition back in 2000. It got me second place in the 220 pound weight class. First place was 480.
I cant beleive that you guys need proof. You obviously have not been to any powerlifting competitions.
By the way, there is a guy in my area that does 600 and he only weighs 198.
And yes a powerlifting shirt was used.