without looking at load data, just in general, if a round won't cycle going a bit more powder isn't goign to change it.
Burn rates can change it though.
One other thought... just a random thought... sometimes the ARs are not smooth until you get 100 round through them or so...
And while thinking... the upper is lubed? Oil and not grease right? They dno't like to run dry... grease is to heavy... mobil 1 30 weight or such... thin film wiped inside upper with a finger, and then on the bearing surfaces of the bolt carrier group...
