Having raised 304 1/2 Ibs. with my right hand in this style I may perhaps claim the right to speak as an authority. The movement needs constant practice with a light weight at first, always adding a little as time goes on. There are three starting points:
The most important thing for a beginner is this, and bear this well in mind: When doing a bent press lift, there is absolutely no thought to be used in pushing the bell with arm power. The bell must remain at the same level in pushing as when it was first placed at shoulder height. The palm of the hand must face the head at this point, and the body must be pressed AWAY from the weight.
10 photos with detailed commentary by one of the last masters of bent press, legendary Siegmund Klein,from his excellent booklet How to Bent Press (1938)!