Critter should chime in on this. I've been out with him a bunch lately and I believe he's seeing great success with H1000 and Reloader 17. He's shooting 180's though. Just a thought.
I do not have the 7wsm but do have the 300 and 270. I had tried Magpro in load development and ended up with RL17. Just had better results in both rifles. Both rifles are Winchester mod 70's
I used it on 162gr bullets works good but when I went down to 154s Win 760 works better. My son's shoots 1/3 in groups with the 154s so I went to that. Velocity is 2930fps for the 154s and 2800 for the 162s