Brass for the 8x68, or my little wildcat, the 9.5x68 is easily made from .375H&H brass. I suspect .300 Win Mag brass would also work well, as I made up some 6.5x68 brass using .300 Winny Mag brass. It comes out just a wee bit short, is all.
-------------------- Daryl
"a gun without hammers is like a Spaniel without ears" King George V