Re: 7mm Rem Mag and 180g Berger Bullets long range loads
Welcome to LRH.
We hunt elk in CO with 7 mm mags. I like 168 VLD for that. Seems like the 7 mag, wsm, saum all fall off pretty badly at 700 yards. This will give you "across a narrow canyon" shot. Check your ballistic tables to be sure.
So my suggestion is to load it up with H 1000 as hot as will give reasonable accuracy. At least 3000 fps if you can. The boiler room on a elk is a pretty big target. MOA is all the accuracy you will need, IMO.
Works for me, anyway.
Good luck on your hunt.