I know this is an older thread but I took the 8x57 case and opened up on the shoulder like the old Gibbs cartridges with a 40* shoulder so it a bit more that an Ackley. Then I chambered it from 6mm up through .375. in the 7mm version it outshoots my 280 Remington and almost up with my 280 Ackley, all out of an intermediate length Mauser. Couldn't be more happy with it. Call this the HSI (Hileman Super Improved) family. It's a wicked bunch of cartridges.