I still think the initial theory holds water. I think if we went beyond 55 yards we'd start seeing the better batches via Bri's theory really out performing the poorer batches.
I think at 55 yards we're just at that point where the differences are starting to really open up but the weaker pellets can still just hold onto a good group.
So may not make a great deal of difference at HFT 45 yards or FT 55 yards but if it highlights what batches are better then it might pinch you the odd target where a splitter may become a kill.
Give it a go Si and let's see what you find.