Those are estimated velocities at impact location based on muzzle velocity and range.
I can’t reach pressure with 130gr TMK and N565 before I run out of case volume but I can see mid 2800s MV with N565 with the TMK.
I think if I pursue that bullet long term I’ll try n560.
Also I’m at sea level. I can’t get 2600 with 43gr h4350 and 6.5cm without flattening primers.
Checking out the new garmin yesterday, I’m at 2656fps w 130gr TMK 41.5 gr h4350, lapua srp brass, 18” Tikka 6.5Cm.
Does altitude have an effect on velocity at the muzzle, didn’t think that was a thing?