Ya know BCP, the rifle was marked 6.5 x 57, and that is what I wanted... it was custom built on a model 70 long action..

but when reloading it, I have to bump the shoulder back with a 257 Body Die before it will chamber...

so maybe the smith just used a 257 Roberts reamer and made me a 6.5 x 257 and just labeled it as my requested 6.5 x 57...

its a good shooter and I've learned to live with that at the reload bench...

I profess tho, that it is my favorite cartridge, as I see it as the most practical all around cartridge out there....
a 6.5 x 55 in more commonly available brass..I neck up 6mm Rem or 257 Roberts..

I also still shoot the 6.5 x 55 and the 260..but if I was parred down to one rifle by the government, the 6.5 x 57 would be the one I kept..

"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC

“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez