I wouldn't fall over from shock to find out that this ammunition is custom loaded for them by either Hornady or Norma. The 8x57 is still loaded to wimpy American standards. I find it odd that American factory .303 British ammunition smokes factory 8x57 factory fodder. The old excuse that the 8x57 has potentially two different bore diameters doesn't cut it with me. The old .303 had a dozen due to the haphazard way that many were constructed.