I will add that it's best to have 2-3 reloading manuals for cross reference. Any load data one gets from friends, internet, forums, etc. should always be crossed referenced with your own reloading manuals.
The 280 AI is based off the 280 Remington so you can safely fire form cases with 280...
Don
Sorry you weren't able to fill your bull tag. Hopefully next time you will be successful.
Glad you were able to meet up with Dr. Mike.
Safe travels back home.
JD338
RL22 is my go to powder but it's non existent.
IMR7828SSC, IMR4831, Hunter, and H4350 would be good powders in the 160-168 gr weight class.
The 150 gr ABLR is another excellent bullet. I've shot several crop damage deer with that bullet at 3100 fps and no deer has ever taken a step. Same powders...