I am just getting started in reloading for a .338LM that is being built. I am trying to get the components together before the rifle comes. I have 2 pounds of Retumbo right now and am looking to pick up some Vitavuori. I am not sure which one to use for the .338LM. Is there any info as to which is best for this cartridge? I tried doing a search but did not find anything that answered my questions.