Hodgdon Benchmark worked well for me with 100 grain ballistic tips. I believe the final load was just over 40.0 grains with a CCI 34 arsenal primer. It shot very well, and averaged a little over 3100 FPS in a 24" barrel. I've also used Varget behind the 100 grain BT's as a fireform load for the .260AI, with excellent accuracy potential. Good Luck!