G'Day Fella's,

NitroX, I would go with a 1970 or earlier Brno ZKK 600 (with Pop-Up Peep sight), in .318 WR Accelerated Express!

FYI, Robert Tobler (Face Book him), of Tobler Barrels in Robertson NSW, have all the gear to do .318 WR barrels.

Hope that helps

Doh!
Homer