The ideal scope mounting height fits you to the gun, scope and mounts as a whole, so when you shoulder the rifle the scope image perfectly centering with your eye. Nearly every gun and rail are different. Try this process to get a pretty good idea of what height rings you need...
With rifle in hand, either with scope or without, close your eyes and comfortably shoulder the rifle, with your cheek on the stock. Repeat this a couple of times until it feels like it is naturally going exactly to the same place each time. Now, do it a few times with the eyes open. Same results? Good.
Now, if there is a scope mounted, was the eye centered looking through the scope or did you have to move your head up and down to center it? Simply measuring the difference between moving the eye and comparing it to the specs of the existing mounts will tell you if you need a higher or lower mount.
If you don't have a scope and mounts to test height with already, put some type of measuring devices on the mounting rail to look at. Place the first about three inches away from where your eye sits and a second at the far end of the rail. (Two small piece of paper with identical marked lines on it will work so they are the same heights.) Shoulder the rifle again, eyes closed, then open them up and look at the measuring tape. Where your eye centers, aligning both pieces of measuring tape will be close to your ideal scope height for that particular Kral.
