I'm not a comp powerlifter, never was, but I wrote this in a PM. There are several former or current competitive powerlifters here, do you think this is potentially good info/advice?
"Powerlifters don't typically go to absolute failure on the comp lifts very often at all, preferably only in comps, the idea is to ideally not miss a single lift during prep, they just go with the daily projected numbers, according to preset plan. But say you do a triple on bench, each rep should be performed as if in a comp or it doesn't count at all. Lift-off, command to start, pause, lift, rack on command, could be in your mind if no spotter. Failing a rep on a competitive lift in training sets a bad precedent mentally. Ideally you only take a chance on second and third lifts in comp. Assistance lifts you might do more "bodybuilding style" but even there top lifters often want each rep to be perfect and standardized in execution, how else to truly know if you're making progress, know what I mean? If even tempo changes you don't know. I have never done a PL comp because there are no untested feds here, but if I were to do one, I would go about it the way I described. No shit lifts ever on the competition lifts, everything should be perfect and ingrained in your psyche."