You could be doing too much.try 3-4 sets flat,inc,and dec bench presses(or dips).If you can't feel your chest contracting,(i'm guessing you can't,and don't lie)then thats your problem.Practice at home without weights,to get the contraction down as you push,and lower the weight in the gym if needed,and it probably will be needed.Then increase your weight,but never at the expense of not feeling your chest contracting,you should be able to make it hurt almost like your bi's with curls.Markus Ruhl suggested to do 2 bench presses and one fly movement,with reps of 15,12,8,and 4 on presses.Branch Warren suggested what i suggested to you.Bench presses are the mass builders which is what you need.And also good numbers,i couldn't bench 330,but my chest is not a problem area.Numbers dont mean **** in bodybuilding,not max lifts,not measurements,not even bodyweight.