I don't stop working up till I hit max as comfirmed by chonograph and observed pressure signs then I look for the highest pressure with the best accuracy. I group shoot over a chronograph while working up a load, so far the highest pressure and accuracy node corespond with low SD and ES.
Then I start shooting at distance and it seems to work OK and based on just a few years of trying to get extreem accuracy and speed for LRH.
I like the longer range groups to reflect what the gun is capable of, if I shoot 1/2 MOA at 100 yrds I want to see it farther down range. Or MOC at 500yrds, Minute Of Coyote
I would be tweeked if I was shooting a RUM at winmag velocity!!!