Sorry, WD, it seems like people aren't using Varget with their .243's...maybe just not yet. Let us know how it works for you if you try it. I plan on picking up a pound of it soon, but to try out in my .223. I like the idea of a non-temperature sensitive powder, as I shoot in the high desert in the winter and in the Central Valley in the summer, so temps can range from the teens to well over a hundred.