I think "new_guys" idea for this thread was to introduce the.450/.400 3" in a new double rifle, the Heym PH, and see if anyone was interested in one. They really aren't common in a new DR on gunshop shelves anywhere in the world. This chambering is NOT a standard chambering for Heym. A possible chance to get an affordable .450/.400 3" from a quality maker may be available.