Re: 8x57 for longrange
Seirra makes four different bullets including a matchking and gameking.
While a Mauser action is strong and tough, the quality of older military actions and mismatched bolts is questionable.
What gun are you shooting? What type of barrel? a heavy varmit/tactical barrel and a light hunting contour are not the same thing at 700 yds, even if they are the same length.
This topic may be covered in another area, try a search.
8mm does not have a huge following, but there are guys shooting it.