When I built my 6.5x284 it was because of the articles I read online primarily, then I see the guys shooting them from BOTW and Gunwerks, and also I read about them on the forums. So I had to have one. Got about 200 cases of Norma brass from a forum member for cheap. Then bought another 200 Lapua on sale a few years ago. I have no shortage of 215M and 210M primers. I can get most any powder locally. What I've narrowed it down to is that the TV guys started with Retumbo, then it seems they moved to H1000. (all of this is with the 140 VLD BTW). But competition shooters prefer H4350 and H4831SC. Then I spoke with a very knowledgeable man who tested Ramshot Magnum, finding it to be as good if not better than any of the Extreme powders in velocity and temp stability. And again, I see guys using a different powder, the Hybrid 100V. So, is there a "go-to" powder for the most part that I can start with much like a go-to with a 308 is Varget or IMR4064? My Bartlein bbl is 24". I didn't want it any longer so I'm not looking to go pop an elk at 900 yards. I have other rifles I'll take elk hunting. I would prefer accuracy first, velocity second. Should I not reinvent the wheel and stick with the 4350 and 4831SC first?