I haven't even bought the rifle yet, but I can feel it coming on. It'll be a bolt-action, so gas port pressures aren't a consideration. Projectile weights of interest will be 80 to 105 grains (narrower, if necessary). Barrel length will be 22" - 26" (the latter, if I have a choice in the matter). I'd just like to know what works best for the .243 Winchester shooters in the crowd. I'm thinking in terms of what meters well, but I can put up with hand-charging the rounds if there's a particularly wonderful propellant for .243, that doesn't go through a charge-thrower at all smoothly.
I have enough medium-speed rifle powders to fuel lighter projectiles if I want, and LOTSA pistol powders usable for cast boolits. Using CBs in this one would prolly be a "dire straits" (not the band) maneuver, anyway, but I plan to lay in a stock of them anyway. I think that the old Chinese curse "May you live in eventful times" has been visited upon me.