I have talked with my old gunmaker once about such scope mount and he dont have seen any problem with cartridges in the 8x57 class. of course magnum cartridges are a different cup of tea.
I never see an dovetailed action break with factory pressure ammo. yes, sometimes they break when geting a new proof but you can destroy most guns and rifles when shoting them with proof ammo long enough.
imho, its one of the internet myth's that such rifles are usualy unsafe.