I couldn't really say, sometimes the oldest of my manuals turns up some of the best data, and other times the newest has the most recent on the new cartridges, so with that said; I'll go with Sierra and Lee, yes the others are great, and many of them a little more technical, but... it's just my pick for right now... I do have the new Western Powder manual on the way, who knows it may turn up something I've never seen. A couple of pic's, there are more, many more.
Just my 0.2 Cheers
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