Thread: Bullet seating centricity any tricks and tips?

Originally Posted by Puffin

New Lapua brass can be quite undersized in the neck generating heavy neck tension. Some seating dies may deal with this better than others. Things could straighten up on once-fired brass when you get to control the neck sizing yourself.

A second thought worth adding; I also had a concentricity issue recently and it turned out to be from wear in the press.

Actually yes the necks were very tight and I thought this was contributing to the issue. I ran a die through the neck of 40 remaining which allowed an easier seat, but still crooked. Maybe once I fire this brass it will come right. I've also noticed the brass is annealed and harder than Hornady because I used the Lyman deburring tool to ensure a good start at seating and it was quite hard.