H4895 and CFE in the light ones and CFE or Benchmark for the heavy for caliber 77's seem to work A-OK for me. I had some decent RL-15 stuff in the light ones but it was a tussle getting it shooting well. The speed was OUTSTANDING but speed never killed the PD's well for me until I worked out the load and the 50 VMAX. I am going to switch to Noslers this year if I can get some range time to try them out.