Stimpy - I know they say they have special powders for the "flex" tips, but how did they come up with all those different blends for all the different cases they have? Is it that easy? I was wrong about the 444 Marlin cases, they do sell those, I just could not find out where, only on their site at a premium of course. They do not sell 45-70 or 30-30 cases. I was just wondering if the cases they have were made stronger (thicker) to with stand higher pressures, or thinner to hold more powder. I just seems odd that they could come up with super duper powders for all these cases that developed higher velocities without increasing pressures. Why would not some of these powders be available to the general public, if that is the case, or why wouldn't some thing like them have been developed before. Why would it be that Hornady would say we want to obtain these "super" powders and get them, when powder companies could have been developed at any time? Even blended powders could have been done by powder companies if they wanted to. Just curious, nothing that important.