Anyone who use quickload get significant differences between the projected muzzle velocity and the observed? I just entered in all of my stats and QL is reflecting a MV that is 100fps slower than what I consistently get out of this load.

Curious if others have had this issue or if this is normal and QL is really just a reference. I have read others getting very accurate results with QL. Not sure if there is a reliable / safe way to "true" QL results but 100fps seems like a lot.

I will post my load but it is only known to be safe in my rifle. (DO NOT USE WITHOUT PROPER WORK-UP):
Cartridge: 308 WIN, Lapua Brass, case capacity 56.2gr H2O
Bullet: 175gr SMK
Powder: 44.3gr Varget
Length: 2.8673" COAL, 0.0012" from lands
Barrel: 24" factory barrel
Temp: 75-degrees
QL is telling me that's 2,640fps @ 55,253psi. Actual MV (measured on Magneto Speed) is 2,750+fps