Hello,
Here's an installation tip for those that's not familiar with Warne QD Rings.
First, separate the ring half's and clean the threads (run the screws in and out) so all the screws turn freely by fingertips - I personally oil the threads, but I also REDUCE the torque, and no, I don't bend scope tubes.
Now, after wiping the mating surfaces clean and deciding which side you want the levers on, position a ring on the scope tube and install all 4 screws, leaving the top screws Loose, but Fully Tighten the bottom screws and then install the other ring in the same manner.
Note: Even with the top screws still loose, the rings will usually be snug enough after fully tightening the bottom screws that you'll mar the scopes finish if you move the rings much without springing them open just a bit. So, fold up a matchbook cover or a little plastic reward card and work it into the gap at the top of both rings and now your rings will move freely without leaving 'their' mark.
Next, with the rings positioned (centered) approximately where you want them, decide whether installing the mounts with the slots towards the front or rear works best for keeping the rings fairly centered while having proper eye relief and good clearance between the barrel & objective.
Now, I tighten the mounts up and get my barrel mounted level installed and zeroed with the receiver level. Then, remove the receiver level and set the scope/rings on the mounts and while firmly holding the front ring forward in its slot, tighten the QD Lever and do the rear ring in the same manner.
Adjust for eye relief, level your crosshair and now remove one the 'wedges' you made to keep the rings sprung apart so you didn't mar the scopes finish and recheck the crosshair for levelness - correct if necessary (you may need the wedge to avoid marring) and then after correcting remove the other wedge and recheck levelness - when leveled, properly tighten the rings top screws.
Test Run. Remove the scope and reposition it on the mounts, but don't tighten the levers yet - slide the scope/rings fore & aft making sure there's no binding, equal contact, feels-right, etc., now hold the scope forward so the recoil lugs are firmly seated against the forward edge of the slots and tighten the levers. Always install with the recoil lugs fully & firmly forward in the slots because the rifle tries to jump out from under the scope during recoil.
Rest assured, properly installed Warne QD Rings go back to zero and hold true every time.