You know, probably the best thing to do is to look at loading manuals and see what powders are listed for a given cartridge and bullet, and see what the relative velocities are and which ones come closest to what you want.

Rules of thumb don't always apply- for example, medium burning rifle powders such as Varget, BLC(2), 748, etc. are usually listed as THE powders for .308- but my most accurate loads in my .308s have been with 760 and IMR 3031 (which have pretty different burn rates). Some manuals list those powders for .308 Win, some don't-- that's why I say manuals (plural).