Boats, I'm fairly well versed in statistical analyses, so I can compare apples and apples. I can pick up one of my father-in-laws new Rugers, Coopers, or even a Bushmaster and, with his well-tuned ammo, I can shoot well under 1 moa for 10 shots any day of the week. I don't see that with the best benchrest breech seating shooters except on pretty rare occasion. It makes me question the superiority of breech seating in general.
The chamber that MP showed us for his .25 cal Niedner jumps out at me as a particularly interesting idea and I wonder if others have ever followed that vein of experimentation.
Meanwhile, I continue to be amazed at the accuracy that the modern rifleman can achieve without building loads at the bench, w/o using a single case over and over, and w/o breech seating. I wonder if all that stuff is really needed. If it is, how does one explain the phenomenal accuracy of modern, mass produced rifles?