I have a Tikka t-3 it is light but it shoots sub moa with factory 165 sgk fom federal, well enough I dont reload for it. I also have a Bergara remage barrel on a 1980's 700 long action , it is sub moa with hornady 178 eldx factory ammo and 1/2moa many times with Nosler 180 grain accubonds.The...
I see you purchased some Hornady ammo, good call that is one of the ammo's recomended by Bergara .I have shot 4 different Bergara 6.5 creed rifles all liked the Hornady ammo the best of the brands tested.
I would drop it in torque it to 30-rear 35-front then go shoot see how it does. I have the same setup, check carefuly around the screw holes, mine has pilars but at first glance they are not always noticeable hiden under paint.