Factory SD/Duty loadings for the combat calibers perform similarly because they are intended to. It's in their design.
No doubt, when loading to full potential there are differences between them, for sure.
This is what most miss . Chicken vs egg . FBI sets protocol , ammo is produced to game the fbi test . Internet folk read it as all “service” cartridges perform the same . Then poo poo folk that mention they’ve seen a marked difference in game ... game is mentioned because not everyone gets to shoot humans
Rabid Creedmoorians ring my doorbell ... as I open it a crack they speak : "Do you have a moment to talk about our Lord and Savior , 6.5Creed?"
