Seating Primers

[Ernest T]

21st century click adjustable hand primer is the cats meow’ however and it’s worthy of repeating that your primer pockets should NOT have any raised lip or deformation. You may want to solve that puzzle first.

So, it looks like the issue is my decapping pin is larger than the Lapua flash hole. It displaces a small amount of brass which makes that ring. Some people have removed it, others have not and it doesn't seem to make much difference in accuracy. I can tell you removing it with my Lee case conditioner takes a lot of force and will be a chore for 200 rounds of brass. I'm about halfway through the life of this brass so I might just live with this for now and look for a smaller decapping pin when I start on my next 200 rounds

This pic is from another forum.