Mantana-Man has given you some great advice! I played around with the .264 win mag years ago and we pushed it to the limits and beyond using a 26 inch Douglas premium barrel.
However, I went to the .300 win mag and never looked back as far as hunting big game afar with this combination using a REDFIELD (4 x 12) rifle scope back in the late 60's.
Now down the road, I missed that 6.5 bullet and put a new stainless barrel on a worn out model 70 30-06. It was a very nice rifle for general hunting needs.
Then I decided to take on a project of using the 300 Win mag case and necking down to the .264 bullet. This became a real long range rifle with an attitude. The .264/06 is more fun to shoot at the bench but the long range Boss is that .264/300 Win mag combination.
