It's soooo nice when you get it worked out like that. Eighty grains under a 300 XTP ought to be excellent.
I don't know your typical hunting ranges Hawkeye, but a "trajectory study" with that load ought to be real interesting. As you've probably seen from some of my posts, I like to shoot two shots each at 25, 50, 75, 100, 125, & 150 yards, all on the same target. It's a real confidence builder to know exactly what's going on.