I am currently doing quite a bit of load development for an upcoming hunt in which I will be using my 300 Weatherby Mag. I have settled on a 165 gr. J-word bullet. I have burned quite a bit of IMR 4831 so far. I ran out of that particular lot of powder and am now burning H4831SC. Since the big Weatherby case uses quite a bit of powder it doesn't take too long to go through a pound of powder. However, my real joy in shooting comes from shooting cast boolits. So as soon as I get back from this hunt to South Africa, I want to do more with my Garand using cast. I will also be shooting the 45-70, 375 H&H, 35 Whelen. I am faced with needing to purchase more 4831 to finish my development and load up about five boxes of ammo for my son and I to take on our trip as we are both shooting the 300 mag. My question is one of needing an opinion on which powder to buy. I would like to be able to use the same powder I am using with my current development later on down the road for cast boolit shooting. Is there a problem with 4831 as that powder? Or should I buy just a small quantity to finish out my need for the hunt and purchase another powder for my later cast shooting? I realize that this is a wide open question that probably doesn't have a perfect answer, and that is ok. I guess I am just wondering what is that powder, if there is such a thing, that is a good powder with a broad application over a broad number of calibers and one that will work for both cast and jacketed?