When going from br2's to 210's using 6.5 Hornady cases I've noticed the 210's seem to set a bit loose in the primer pockets.
I keep br2 cases and 210m cases separate from each other.
As for velocity they seem to run very close using same powder, seating depth, neck tension and brass being...
Me
I started with a single stage Lee. Then bought two more. Then a turret press.
Then Dillon 550
Then Dillon square deal
Then a RCBS summit single stage.
LE Wilson dies.
Now I use both Dillon's to load 9mm
The RCBS to resize 6.5 Creedmor and 308
And only use L.E. Wilson dies to neck size and...
The Ruger in 6.5 is accurate out of the box. I'm sure the 308 is to. There are many factors in accuracy. A good starting point is factory match ammo. Not just one match ammo is enough. Different ammo match ammo will set different projectiles/seating depths/powder charges/primers, all of which...