I load for that round.
Its easier to buy winchester whitebox in that caliber for the loadable brass than buy it in the raw. I use a couple of powders win748 works decent as does varget. Pretty much any powder that works for 308/30-06 works in x54r.
my dies are rcbs ones as they come with both 308 and 311 expanders. Your real issue, if your rifle(s) arent tight enough bored to shoot 308 bullets is going to be finding decent .311 bullets. They just dont exist in bulk volumes. There are lots of light 123grain x39 .311 bullets but those really suck in a x54r rifle.
The latest hornady manual lists loads for it as does sierra
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent