I would use the straight Hornet with a load of Trailboss, probably around 6-700fps with a 40gr lead bullet. Don't have to measure it, just fill up the case, seat a bullet and shoot. Load it with hand dies and go. You can't get enough into a case to create a pressure issue. Also factor in the Traiboss will work in just about any chambering you've mentioned for a reduced load. If your talking about a bug out rig for a centerfire, having a single powder that will work for all situations is ideal.

Last edited by cmjr; 05/14/15.