A couple of observations that it has taken far too long to note...
If I am doing reps, I am good for 3 sets of bench, at over 300#. I can squeeze in a 4th, but I am definitely going downhill by that point.
If I am maxing, I am good for 4 sets, at over 300#. Yesterday was a good example. 315x2, 340x1, 360x1 and 375x1. I could feel, at that point, that there was no point in pursuing it any further.
So, next time I max, I need to make sure that my 4th set is the weight I want to stop at. That was a mistake, yesterday.
Also, I am fighting the urge to keep maxing, since I have recently hit PRs in MP (reps) and Bench (iRM). I need to make myself stick with what has been working. That, though, has been kind of a hodgepodge and play it by ear.