The traditional European SS "stalking" rifle tended (s) to be a rather light elegant thing to make it ideal for, well, stalking. Like the Eastern US much of Germany and Austria where this style is popular is forested and hilly. Most of the continental middle-weights exist in a rimmed version to be optimized in combination guns and single shots.
My problem with the 45-70 is that a weapon to handle it comfortably is beyond what I would call a stalking rifle. Even a 9.3x74, which is a wonderful round, would need a platform with quite a bit of plain old weight.
A 30-30 in a custom single shot, however, could be built into a very elegant little thing indeed which will easily handle anything in the East. Because it is a single you could use any bullet design.
