Nice to read this old post..
I'm a fan of this old glory, the tug bullet.
It was designed and engeneered by the greatest gun guru ever seen in Europe : Wilhelm Brenneke.
He started with the Tig, and then He created the tug. It was a natural evolution of his studies: having invented the 8x64 and the 9,3x64 it was necessary to generate a better bullet that could deal with high impact velocities.
Brenneke was a son of the dissolving austro-hungarian empire, were hunting was a serious affair for nobles, and there was, and still is, a millennial culture involving hunting, modelling the territory to increase wild life population, cooking venison.
All his bullets works in full respect of the german doctrine: one shot Only, straight in the Blatt (boiling room), the bullet must produce a wide wound, shedding weight and dumping a lot of energy, but at the same time a sure exit hole is required. This for a clear blood trail to follow with the help of a good bavarian hound. So this explain way so many dual core bullets are german... Tig, tug, H-mantel, DK, and no one in the world could do it better than a german engeneer.
The old Tug is killing from more than a century, and probably will do for another.
Doc