Quote Originally Posted by XC700116 View Post
Yes, my LR rig will crater primers with very light loads and soft primer cups.


Also from what you said about tying to measure the OAL to the lands, I'd try loading a bunch, or just further seating the loads you have to 2.780 to make sure you're not jamming at all. If the pressure signs go away, you have your answer, but continue with caution.
But wouldn't seating the bullet 0.02" deeper cause other pressure signs?