To further clarify Nonte’s method, it required two dies (actually a die and a ram) which effectively “pinches” the walls of the case between interfering diameters, and then Pushes the base downwards, effectively “stretching” the brass between the head and the “interference fit”; a 63mm 30/06case ( blown out cylindrical, by the use of another Nonte method ( an old Krag receiver, a bored out barrel, and a “fireform load” of Powder and Oatmeal); the cylindrical case is then annealed, pushed into the first die ( as in the illustrations in HGCC book), the two diameter punch inserted, and the assembly pressed down using a Hydraulic or screw press. Nonte reported using this system for stretching 45/70 cases up to 45/100, .348 to 50/110, and of course a whole slew of "Drilling "Cartridges such as the Sauer rounds, and also some of the Austrian Collath rounds, which are of similar lengths ( 72-82mm).
The combination of stretch and reduction of Case diameter, also makes the final "head swage ( again a special “Ring” die and Hydraulic/Screw press, easier and brings the case to final diameter. A clean-up lathe work of thinning the rim and clearing the extractor groove of “Flowing Brass” , with a final trim to length, makes the finished case, as seen.
Regards, Doc AV