I just recently purchased a cz varmint that i will be handloading for, but i also load for several other rifles, do any of you know a good powder that will be conducive to 223 rem, 308 win, 22-250 rem ?? i know a few like IMR 3031 IMR 4895 and H335. I want to be able to buy a 5 lb keg or 8 lb...