My son prefers Magpro with Nosler 150 gr Ballistic Tips in his 270WSM, while I prefer Accurate Data 86, a non cannister version of 3100 with the 150 gr bullets. FYI, Accurate 3100 is no longer being offered for sale by Western Powders, Accurate's parent company. With 130 gr bullets, I like Reloder 17, while many people believe the new Reloder 26 to be the holy Grail for Magnum cartridges, short or otherwise. I haven't tried it yet, since I would like to use up what I have on hand.