Sportsmatch or Unknown Munitions are by far far the best Tikka rings on the market.
All vertical split rings that I know of do the below.
Imagine how they interact/tighten on the rail and tube. When you install them, you must tighten the base first. Now, you have a tight spot at the bottom of the scope. When you tighten the top screws, you are pinching the tube from the bottom. That’s why they cause issues- they “hinge” from the bottom and pinch the tube when tightening down.
Conventional rings have the base screws and ring screws separate, and “clamp” the tube evenly from both sides- they don’t pinch.