So...where published in any reloading manual is there reliable data that would allow the 7x57 to perform as it should perform in modern firearms like the CZ or Ruger? To me its wonderful that people have produced 2900 fps etc, but as a cautious reloader I like to have reliable data that tells me where I need to stop. I don't think that anyone wants to make the 7 x 57 into a 7mm Rem Mag, but it would be nice to have data that allows the cartridge to perform in what you might consider to be a more reasonable range given modern firearm steels and designs.
