I recently did a load development for a .280 A.I. I used Hornady brass and it did great. Of course I had to run it through the sizer, and trim/chamfer/debur, followed by flash hole debur. So, it does take some work, but it is available, and ends up making very good ammo. I took the powder charge way higher than any data I could find and the brass took it in stride.
FYI