400Nitro

There was indeed a fellow on AR that promised to send pictures of riflling imprinted on the outside of a barrel. They didn't ever show up as he said the gun was a friends and he couldn't get the pictures.

I have seen, in Darwin, a 308 Steyr with imprinted rifling. It was used as a culling rifle and had fired many thousands of rounds of solids of some type. It was still supposed to be accurate. Alas, I never thought to take a picture as it didn't seem unreasonable or unusual enough to me to think of it.