With that theory we would only have half a dozen cartridges. My reasoning for it's creation was a fondness for the X57 case, and a plethora of .30 cal bullet options. It was odd that there never was a commercial X57 .30 cal cartridge. In addition this nestles in nicely between the .308 and .30/06, and provides a resolution to the age old debate between the two cartridges, although it is closer to .30/06 in performance. As for trouble, it is 8X57 passed through the sizing die, no extra steps to arrive at a cartridge. I am getting 2740 fps with 180 NBT's and Alliant powder and it has a very pleasant recoil cycle. I have taken half a dozen animals with it including deer, bear and moose with excellent terminal performance. I am using PPU 8X57 brass which is easy to come by and inexpensive. I currently have two rifles chambered for 7.62X57, a Walnut Blued M77 Mark II and a Stainless M77 Mark II with Bob Jury barrel. In the picture below top to bottom; M77 Mark II .450 Marlin, M77 Mark II 7.62X57 HC, M77 Mark II .358/375 Ruger, all with Jury barrels, B&C stocks and Leupold scopes.