I never could bench all that much -250 at best.
But one single rep of astonishing weight is not a measure of muscular endurance.
Why do people think that the NFL combines use 225 lbs as a measure? To see
how many times you can do it non-stop - muscular endurance.

I could curl 135 3 sets of 8 reps, power row the same amount the same number of times,
Lat pull 200 3 sets of 8 times. There was the thrusting strength needed for blocking
or shivering a block.