Primer seating suggestion
1. Make sure primer pockets of the cases are cleaned of powder residue with the primer brush.
2. Make sure primers are placed into the primer seater device that came with the Lee loader squarely (properly).
3. Press down on the press lever with sufficient force to seat the primer into the case; rotate the case 90 degrees to 180 degrees and press down on the lever again to reseat the primers uniformally all around the primer pocket.
4. Visually inspect cases to see if the primer is flush or slightly below the case head with no area askew (out of round). If not, repeat the reseating procedure accordingly.
5. Call Lee Loaders customer service technician for added suggestions.
6. Forgot to mention........ occasionally look into to primer seating device pocket to make sure no slivers of shaved metal case strips remain in the seating device. Otherwise, they will leave an indentation on the "seated" primer face.
hope that helps
Thomas