Re: Best Powders and Loads for the 7mm and 300. wsm
Dont forget RL-19 and IMR 4831. They perform very well.
Some folks will say Magpro powder for the wsm. It gives great velocities from what I here, but seems to be a Love/Hate thing with accuracy. Some rifles love it some hate it from what Ive hered.
About the only thing you can do is load and shoot and see what loads and powders your rifles like. If your stuck on using just one powder to get you started look hard at the IMR 4831 for a good all round powder thats very temp stable. But Id lean toward RL-19 or RL-22 and IMR 4831 for my top pics.
As far as shooting your 7mag (I.M.O.) Id go with a bullet in the 160gr ish range rather than 140's or 150's. Youll EASILY get 3000fps+ and a way higher B.C. As for the 300wsm, (again IMO) A 180gr first pic, or at least 165-168 gr min.
My favorite primers so far are the Fed 215 lg mag.
Read your loading book carefully every chance you get, and you'll pick up alot of very usefull and helpfull info on powders etc.
Good luck with your choices
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