I did weight train in high school also it counted as a credit as well. senior year I had my college english and history classes for some early college credits then lunch then finished the day with keyboarding weight train and pe. God senior year owned I miss it so. its been a while since I have maxed out on bench actually I rarely do flat bench with a barbell except to mix it up once in a while I usually do flat bench with dumbells first 1 warm up set then 3 work sets of 10-8-6 on reps then I do 3 work sets of incline barbell press since im already warmed up no warm up set there then I hit dumbells again for 3 sets of flyes 12 reps of these to finish up. last time I was doing regular bench I was doing 340 for my 6 rep set so i guess you could try to figure a max from that. Of course I have had more years of lifting to get that high than you young-uns hehe.