i have 2 manuals and neither explain thouroly how to choose the right powder they only give a recipe for some. i am trying to work a load for my 223 and when i looked it listed alot of powders so i thought i might start with some i already had. someone recommended win248 so i bought that, then i saw loads with h414 that i use for 270 and 7mm-08 and h380 that i used for 243. why would any of these powders be good or bad for 223.doing a little research i found that h414 has a recipe from 223 up to 300 mag that seems like a wide range to me