not sure what my max is....i never do 1 rep maxes. I can do on my 4th set 4 reps of 140 kg and i weigh 75 kg.
that's really strong dude! What are your other lifts at?
then it's really weird that your dead is that high, but oh well, sometimes weird things happen You're sure you did everything right? counting the weight on the bar and all?