Ran some test loads with Reloader-17 in my 300 Win Mag.I was shooting 180gr Speer Deep Curl bullets.I got 1/2" groups with 72.5grs of Reloader-17 @ 3215fps!!!! with no pressure signs.
I'm impressed! Great luck, too. I wasn't so thrilled with how consistent R19 was in mine. It was probably fine, but I seemed to always, have a flier, maybe I just wasn't patient enough.