I just received that same barrel in 6BR a week ago from NSS. I also got that same reamer print, .060 freebore and .271 neck. I measured the distance to the lands also with the Hornady gauge and got a OAl of 2.343 which I was happy to find. The neck turned out to be .272 which is also good.
I don't know if this matters but I got the Select Match barrel.
I believe the ideal seating depth is if that point on the bullet, where it starts to taper for the boat tail,(still full caliber) is above the neck-shoulder junction. The AMax has the longest body of the 105's and is longer then the 107 sierra.
Anticipating the short freebore I called Shilen and asked about cutting it longer. It would cost " $45.00+$20.00 for shipping and take about two weeks".
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