Muzzle Velocity with Suppressor

Hey all, just curious about some numbers I’m seeing with my suppressor on my CA Ridgeline Ti .300WM. With out my can on it it has a MV average of 2974fps. With the suppressor it is averaging 3009fps. While the Nosler AccuBond 180gr states it is 2950fps. Are these normal variances?

A mv difference of 30fps would be weird with a suppressor added. Normal might be a max increase of 15fps.

How many shots with each were done to get those averages? Maybe more shots are needed?

6 shots, using a Labrador and a MagnetoSpeed simultaneously and they were within 1fps on the average.