Just getting started in the reloading world. I'm planning on reloading .223, .270, and .308 for now. Plan on doing a few more, but want to get practice. Have a RCBS kit on the way. Just wondering about powders. Is it better to go with one type for all 3 calibers or should I use different types for each? I see a lot of reloaders using Varget and wonder if that is a good start? Thanks for any help.