[TRAAK's]

So much can affect accuracy from one rifle/shooter to the next. I ran 5rds of 7n6 through a chrono last month for grins and saw speeds of 2992, 3010, 3022, 3027 and 3032.
It would be interesting to see results from the other 5.45 ammo you mentioned. Projectile diameters play a major role in accuracy from one barrel to the next along with
powder load. Many times a shooter will find a lesser charge is better for them with regard to accuracy and felt recoil, less anticipation and flinch.