my double was a john rigby, and climbed the muzzle a lot on recoil.
the only boltgun I have owned that was anything like it was a sako finnbear.
you had to physically hold them down, and this barely helped.
the physics of drop at heel.
more modern boltguns, some factory and some stocked by myself, hardly have this trend at all.
maybe the climbers were more suited to iron sights, and the rigby would never have been tainted by a scope.
modern boltguns are stocked more for scope use as you say, but this is not a problem with good quality scopes of the correct power.
the same holds for scopes on doubles, in that you cannot really stock a rifle for both properly.
a good low powered scope, properly mounted is possibly faster than irons anyway.
older boltguns also had too much drop at heel to come straight back.