Thanks guys, all great observations. Anyone try R17 in your 300WSM? I shot it in my 300WM (before the present Bergara) with the 150TTSX but it was around 45 deg constant. I didn't get to try it around 80-85. I played with R26 in a previous 22" .270/160PT and it was a i inch shooter until it hit 80 deg. It then went wonky on me. Out here, late Sept and early October can be very cold at night and pretty hot by noon.
