Personally, I have a couple RCBS presses===The Supreme and also the Ammomaster, the later I use for Nitro cartridges..you can also get RCBS dies for your caliber

As to brass--your decision..Winchester, Norma (which I prefer) or whatever--but whatever you decide to use--keep using the same brand..and same lot if possible..check the cases..for flaws and throw away any flawed ones..

As to powder--you will need to experiment on what works best in your gun..once you decide on what that is.,but a bunch of the same lot number from the factory --as things change from batch to batch-

For powder --currently I am using Reloader 15 in everything --from .375 H&H to 458 to 470 Nitro..
-- it may or may not work well in yours

I used Federal Primers--for your caliber--here in the US I would use Federal 215 Gold Match..

BigMax stated a quality bullet--for dangerous game --I use A-Frames made by Swift almost exclusively...have recovered many..and have never had a failure..in velocities from 2200 fps to 3400 fps...

Advise what other info you may need---plenty of people on this site what can help as well..

Ripp