northern hunter,
Here are the specifications from the artical;
Cartridge: .257 Shooting Times Westerner
Parent Case: 7mm STW or 8mm Rem. Mag.
Case shoulder angle: 25 degrees
Max. case length: 2.850"
Max. O.A.L. 3.60"
Max. neck dia.: .290"
Primer: CCI 250
Twist: 1 in 10"
I can also give you some of the loads they talked about if you want. Hope this helps you. Lawdog