I used to be able to aggrivate it on benches over 220 on my right hand. I layed off it, and readjusted my benches so that most of the weight is kept off the weak part of my wrist (the pain was in the backhand). Seems to be working so far. Have to be careful.
I used to get the same pain, just stopped curling for a while, and the pain went away. After the event i found out by doing close grip barbell curl - pain come back .. i dont bother with that one any more.