In last week's range trip, it coincided with the monthly purge of one magazine of my EDC ammo.
Until this most recent trip, normally, the grouping on the EDC ammo is a smidge tighter than my training ammo. I have theories as to why, but that's largely irrelevant to my most recent lesson.
This time, the grouping on the EDC mag was about the same as my training mags done at engagement speed.
One magazine of training rounds is dedicated to the "Ragged Hole" drill -- time is of NO concern and accuracy is everything. The grouping there was insanely better than the other mags -- even the EDC ammo.
So that susses it. I've reached the stage where the tools all work the same for me.
I am literally now my only remaining enemy in the journey toward perfection.