I wouldn't seat any deeper, there would be no benefit. You would soon be sacrificing powder capacity too. I think you need to decide if it has to be a magazine feed or not. If not, do the Berger seating depth test starting at the rifling and work your way out and see where your groups are the best. If it must be a magazine feeder I would leave it seated where it is and work with your charge and even primers to see where you can tighten things up accuracy wise. You might experiment with different powders too.anyone want to answer my previous post ?