I loaded it under some 170grn commercial cast bullets, it was an excellent powder and turned in the lowest SD of the 4 powders I used for testers, I've also used it with cast in my .308 chambered Savage 99. It has also become my favorite powder for the .41 Magnum when I load them for my Marlin 1894, and I have some test loads for the .45 Colt loaded up, too, waiting to test.