Not that there's anything wrong with these slow and super slow powders but I am committed to the one powder for as many cartridges as I can idea...my bench used to look like everyone else, it looked like a Christmas Tree with cans of every color, shape and size...during the latest drive everyone to beg for powders I'd had enough, shot it all and settled on the one powder that can be used in just about everything I have, from 6mm to .416 and as many in between cartridges as possible. Sure, these slow powders give more velocity but I now only have 8 lb kegs of H-4350 on my bench and two in reserve sitting next to it, when I use one, I buy one and rotate the stock always having two in reserve, my life and shooting got a lot easier, try it, you might like it !