Thread: Primers not flush on brass - effect on measuring OAL and jump

The primers don't sit flush with the base of the brass when I seat them and they protrude a small amount. (Winchester 284 brass, federal 210 primers).

My question is in relation to how I will measure OAL to correctly know what jump I am seating my projectiles at. When chambered, I am guessing it will be the protruding primer in contact with the bolt face instead of the brass now? If so, when I measure OAL from the primer to the ogive of the projectile then I am getting the correct measurement for how much jump I am setting them at?

Hopefully that makes sense.