All you need is a very good rail and correct positioning on the mounts on the rail. Mounts on my N470s are excellent. I use Burris Zee signature mounts and leave them on my scopes. Just take bolts out and slide off rail. This is where you find out if you have a good rail. I mark the exact positioning on the rail with a marker pen. You can use a torque wrench but I just tighten up by hand. I just cannot understand why Burris Zee signature rings are not used more widely.
D
Ditto, I use a combination of Burris Signature Zee rings on the scopes & Burris Weaver bases on the rifles. Locktite the screws for the bases.
Fit the rings so that they can only go on the bases in the same place each time - the bases have pairs of slots so I set the rings up to use the two that are furthest apart - this also helps you fit the scope back on as one ring will slide on before the other.
Start by fitting the bottom half of the rings & before tightening the screw up fully push the front one forward so the screw is against the front edge of the slot then tighten - this provides you with the datum for future fitting. Rear screw doesn't have to be pushed forward so I give that clearance in the slot. I don't torque these but tighten by hand until I can feel there is no more movement.
The Burris Signature Zee rings have plastic inserts so will 'self align'. Put the scope into the bottom half of the rings (with whatever insert you want to give additional elevation etc.) then do the screws up on the top half of the ring just enough to hold it but so that you can move the scope back & forth to get eye relief & rotate to remove cant.
Then carefully do the screws up in a corner to corner order i.e. top left, bottom right, bottom left, top right. Start off looking at gaps between the two halves of the ring & then feel for just a bit of resistance on each screw before going to the next, keep going round the screws until they are all tight - again I don't torque but 'feel' by hand.
I run a variety of scopes on different rifles using this system, including for air travel, and have never had any issues with loss of zero. Just make sure that when you refit the scope you push it forward so the screw in the front ring indexes in the datum face in the slot of the front base & away you go.