I just turned 18 and am 5'11 210, I started benching hard when I was 14, and used to do all powerlifts 4 times a week for about a year, and my bench went up from 255-340 from my freshman to sophomore year. I widened my grip and started benching with less reps only once a week my junior year and got up to 420 by the end. I have been following a simliar routine this past year but with less results, I've been stuck at 455 for months, I need some hlep to overcome my plateau, I have tried everything form all the different kinds of dumbell presses to every kind of grip bench.A bodybuilder I know told me to try only 2 sets of 4-6 once a week but i really dunno. Every other part of my body is getting stronger except for my bench, any help would be appreciated, thank you.