Re: Just a big thank you!
Seems like a good choice to me. A couple of small thoughts, one is to get a minimum spec chamber (think its all CIP).
Second is to consider 6.5x55, I think the SWS 2000 may be available in that but would need longer Sako mags (TRG 42 .300 Win Mag). It is the same performance as .260 Rem but has a longer neck so seating long bullets above the shoulder/neck junction is not a problem avoiding donut issues. It has a 26 degree shoulder and mainly good Lapua brass is available. I would try to spec a minimum spec chamber/throat with it though as normal 6.5x55 COL is 80mm. Also a .296"-.294" diameter neck would be nice. My last Blaser in it had a .297" neck. (The neck diameter goes for .260rem or 6.5x55 a long throat in .260 is good so long as you can feed from the mag and seat into the lands, I think the Sako (TGR 22) mags have a 75mm COL).
If you go .260 rem. try the Norma 7-08 brass and neck it down.(no additional kit required) I did not do that I went 243 Lapua, necked it up, turned it etc, had I had known the Norma was availabe I would have tried that first.
Take what I say for what it is worth, the 6.5x55 I have had experience with, the .260rem I went with because I had no choice with the action, I am also still waiting for the rifle so the only thing I can comment on is the case prep with it which I have done.
Last small thought, get a set of Redding Competition dies.
Hope it helps,