Any standard primer works well with the Benchmark - or Trail Boss. With other powders in these straight cases, I found I had to use CCI 250's or Rem 9 1/2 Mag. to get decent burning.

The trouble with Trail Boss, is they become plinking loads only, not good enough imho for hunting.

The .45/0 can be an excellent hunting round, capable of producing terrific smack-down-killing power on many species of big game. I feel trail boss is nothing more than a plinker for shooting tin cans.