New reloader need powder advice

[Dom]

Welcome to HC ApacheHunter. Sounds like you're on the right track and off to a good start. I'd recommend that you do your load workups for both powders, as you've done your homework, and try those powders out that work for most. Then just fine tune them if they look promising. If you haven't already, check out Rocky Raab's website on Reloading 101 also. Since I don't reload for the 280 I don't have any possible loads for you, but I use Hodgdon (sometimes IMR) 4350 and it is a winner in lots of other calibers. Waidmannsheil, Dom.