Work up with Varget and start with a seating depth of 0.050" off the lands, and tweak from there. There likely will be no tweaking needed...
I second this but I had a little better luck with RL15. I don't have my notes in front of me, but think I use 49.5 g for ~3050fps in a 22 inch barrel. The key was seating them deep as Jordan wrote. At .020 the were just okay but really tightened up when I seated them deeper.
