No comprehensive manual has the space to show every combination. As a result, there will always be some combinations that don’t get listed. In assembling our manuals, we try to include those powders that are best suited to the cartridge/bullet combination being tested. Of course, it may also be a case of the powder you have not being suitable to the cartridge you want to load, as well. For example, you want to use Win 231 in your 7mm Remington Magnum, because you have several pounds on hand for your .45 ACP? It just isn’t a suitable choice. In a situation like this, nobody is going to show loading data for such a combination.