For anyone seeing out a great 264 Win Mag load for a 1:9 twist, after much experimenting, I've settled on a great consistent, accurate load. This weekend I shot at 700yds in 10mph wind, prone off a Harris bipod. 4-shot group under 6" . Could not be more pleased with it.

Nosler brass
Hornady 120gr ELD, seated 3.245" , 0.005" off lands
Federal BR Mag primer
70.0gr Ramshot Magnum 3250fps
Ramshot burns cool & clean, meters great.

Rifle
Remington Sendero
Timney Calvin Elite trigger 8oz
Nikon X1000 6-24 X 50mm scope