Got lucky and drew a area 58 bull tag, Wyoming.
My daughter and I are driving out in early October for an antelope hunt north of Casper then up to Cody. She uses a Browning in a 260 Rem. with a 140 Nosler Partition. I'm taking 2 guns, LH Rem. 700 in 270, 150gr. Nosler partition, and a Ruger#1 in 7mm STW with a 160gr. Nosler partition.
Not packed but have assembled a pretty good pile of gear. Still working on perfecting the load for the 7mm.
We will be going in with horses.
You have the bullets figured out anyway! I will be hunting south of you for cows in December. Just remember that country is grizzly central.