The powder companies' booklets and their websites give you "published loads" which is what you should be loading, unless you have tested loads from other sources. RST has a file cabinet full of loads that have been pressure tested, and they will share that information with you. They continuously test existing and new loads and insert the results in their files. If you ask about a load they sell that they do not have in their files, they will shoot it in their test guns and tell you what they find. It is all done at their factory office, which has a firing range within a few feet of their computers and desks. I know, hard to believe, but that's the way it is.
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