My supervisor at work says he has a chest routing (bench press only) that will increase my 1RM by up to 40lbs. He is strong, and says this is the routine that helped him get to over 370 on a 1RM.
Here it is.........
Monday 5 sets of 5 @ 70% of 1RM
Thurs 2 sets of 5 at say 60%, then to failure on 3rd set. If over 10 reps, ad weight next week.
I may have missed something, but maybe it'll work.