Ramshot Magnum has proven to be an excellent powder for me in the 300win mag and 6-284.
Very stable and consistent.
I have also found a very large sweet spot as well.
Barnes did a test on powders and primers as far as temp stability and in the 300 win mag they too determined Ramshot Magnum was the most consistent, even slightly more so than H1000.
I know that will be surprising to many!
In fact I was thinking of starting a thread called "Why no love for Ramshot Magnum"
I think it is the most underrated powder out there.
The tests with the standard vs magnum primers also gives very interesting results.
Here's the link:
July 2010 Barnes Bullet-N | Barnes Bullets