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I just purchased a Weather Warrior 116 with a 24" barrel in 6.5-284 Norma. I was wondering if anyone has used Accurate MagPro or Ramshot Magnum powders for this cartridge? I know H4350 & H4831SC are the premier choices, but I don't want the associated throat erosion. On the accurate shooter forum an individual swears by H1000, but that seems hard to find. Western Powders has updated data for MagPro and Magnum , but I have seen little discussion in regards to how they actually perform.
I asked the very same question not long ago. Here is a link to that thread and my range results.
http://www.savageshooters.com/showth...Ramshot-Magnum
We tried the MagPro, but accuracy was all over the place. H4350 and IMR7828 shot better for us. Don't overlook Retumbo if you can get your hands on it. I haven't been able to, but there's lots of info on the Retumbo and the 140 VLD on the Long Range Hunting website, last time I looked it was 60 some pages. Lots of useless blabber with some good info thrown in.
Retumbo is my favorite powder for the 6.5-284 but after messing with a few different rifles chambered in 6.5-284 it either loves Retumbo or hates it. I have found if it doesn't like the really slow burners it generally likes H4831 or something similar.
I have shot qiite a bit of the magnum powder as well as most of the ramshot line up. I have been pleased with the results of all their powder. To answer your question about the 6.5-284 try around 57 grains and a bullet in the 140 range. I think you will be happy with the way it preforms, just as a side note this was with a regular primer not a magnum. Not sure if it matters.