First I am surprised at lack of separation and secondly if I was shooting that good regularly I would be dancing in the streets (very nice).

I am getting 4 shot groups of that class regularly but always a 5th in there someplace I get off and opens up to 1/2 or 5/8.

Progress but slow.

While I don't have a long enough term use on the PPU (rifle) for absolute, it is acting more and more like a poor mans Lapua and your results seem to confirm that.