I'm using a 300 Win Mag with a 26" Varmint contour McGowan barrel 1:10 with a Savage 110. Gun isn't heavy by any means.
It likes the following loads with 210 Bergers.
75.7 gr of H-1000 and Federal Gm-215 primers. 2860 fps.
76.2 gr of Retumbo and Federal Gm-215 primers. 2900 fps.
H-1000 has slightly better accuracy, very slightly. Anything hotter than those loads and the groups open back up but I still had no pressure signs. Had the Retumbo going 2960 fps with one load.
The gun really likes these bullets. It took a while to get these loads figured out, mostly with seating depth. I'm right on the lands at 3.575" OAL. It certainly comes out to greet you but doesn't buck as hard as my 7 mag. I'm good for about 50-60 rounds if I am not rapid firing like I used to.
Don't know if this helps you or not but I am very pleased with this setup.