I've been gone. Yes I have one also, it is one of my favorite coyote hunting weapons and very accurate. Mine has a .260 groove diameter, it will shoot .257 bullets but I'm leery of blow-by ruining a irreplaceable barrel. C&H supplied my dies and made me a bullet swaging die to take .264's down to .260. Brass is a bit of a problem in my rifle, regular 6.5x58R Sauer Bertram brass is too thin in the neck and brittle, I have to keep annealing it to keep it from splitting. I have much better luck with Norma 9.3x72R brass and forming it to 6.5x58RS. My chamber is generous enough that I don't even have to ream it.
L-R 243, 6.5x58RS, 9.3x72R
200 yards with the 75gr V-Max .257 bullet
It works well.
Mine is Suhl proofed and was made for Wilkes, I believe a retailer, actual maker unknown.