So, I haven't found a diagram, but the Tikka manual states:
"Scope mounts will fasten to the 17mm rail on the top of the receiver. A circular hole on the front of the rail will act as a recoilstop, ensuring a positive lock between the scopemount base and the receiver."
There is a small circular hole and a bigger round, but it looks ovalish to me....
The sportsmatch rings have a steel recoil pin that is too small for one hole and too big for the other.... So, what's everyone doing?
Well, we don't rent pigs, and it's better to say it right up front because a man who does like to rent pigs is — well, he's hard to stop.
If any slop just push it to the forward till it stops. Just like any other recoil stop. The rear doesn't mean jack squat. Scope goes forward with recoil