JPro; I have nothing to contribute that will help you...I just wanted to share that I'm collecting parts now to have a 6mm-06 built on a LH Model 70. It'll be a deer rifle and I plan to shoot the 80gr TTSX in it, but I also find the 90gr E-tip interesting.
I've got a PacNor SS #1 contour in a 3-groove, 10" twist. It'll have a finished length between 24 and 25 inches, and I went with a #1 to keep it light. I won't be shooting prairiedogs with it, so heat buildup isn't a concern.
As soon as the EDGE gets sent to Redneck, things should start to come together.
I hope you build one, and will be interested in your particulars and results.
