I'll do a max day and knock a 300 lbs bench out. It'll be a struggle, but I'll get it. Then it seems like a mint later I'll go to max and either not gain any, or not have enough to get my previous max. Between max outs I'll do a week of high reps then a week of work to failure with increasing weight then decreasing weights. Then low reps with high weights (say 250-275). What am I doing wrong? I'll do incline, decline, dumbell.