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Just loaded up some 200 gr ELD X with RL 26 for my 300 Win Mag hope to get around the advertised 3000 fps, Should be much like Blackmac load in the WSM. Hope it's accurate.

Yes it is as it is ADI powder re labelled. In the manual I use Hybrid 100V doesn't appear to have a ADI equal but it's burn rate sits between H4350 and H4831. Ideal for calibers like the 270 Win,243...

Superformance powder is meant to be good in the 300WSM

That was with the 180 gr Accubonds

When I had my one I used 65 grs of AR2209 for about 2970 fps. I think it is a bit over book max so work up to your safe max. Rifle was a Ruger 77 MKIi