Various ways of looking at it Rui, all manufacturers cut their dovetails different, theres no standardisation even from a certain German maunufacturer on same gun.
So if you slap say Sportsmatch on a shallow cut dovetail it will crimp the top over.
Likewise if putting on any other mount on a properly cut rail it wont have the grab as usually the peak of dovetails are flattened off.
We wont go in to crossover even more confusing.
Ideal way is bomb poof mounts with the top dovetail cut to suit those mounts, rail to suit the rifle with any inclination required. More sturdy and less to go wrong.
The only trouble is you need to work the inclination out by trial and error as each scope model is different.
Steyr rails are 25MOA.