1. Thoroughly degrease all screws and threaded holes; oily threads won't stay tight. Degrease the inside of the rings, too, as well as the 'scope tube where the rings will contact it.
2. Use a little Loctite on the threads. Prefer the "Blue" which is removable. "Red" Loctite is virtually permanent, and may require heat (300F) to remove.
3. I dissolve a little rosin in alcohol, and "paint" the insides of the rings. Many will say this is not needed, but I find that despite the miniscule thickness, it gives the rings a better "grip" on the 'scope by greatly increasing the sliding friction.
Optional step:
4. Lap the rings.
I like Leupold rings . . . but I found out that the Torx wrench they supplied was soft, and didn't even fit the Torx socket very well. I ended up using the one from my Wheeler gunsmithing screwdrive set instead.
Oh . . . be sure that the base screws didn't "bottom out" in the tapped holes in the rifle receiver. Sometimes the supplied screws are just a tad too long. (This is actually a benefit, since you can then file them down to the proper length to get full engagement.)
Should all work out well for you - the 7mm Mag isn't a heavy kicker, so the double-dovetail rings provide more strength than necessary . . . which isn't a bad thing, as long as the tapped receiver holes line up with the barrel, so you don't run out of windage adjustment in the 'scope.
Good luck - post a range report after you give the rifle it's "baptism of fire."
