Shilen 18" barrel and bolt

[tplace]

Wow, you're right. Guess I don't have a future as a machinist, high school shop was a long time ago.
How about this one? If I'm reading it correctly (slim chance) it's not SAAMI.
http://i1224.photobucket.com/albums/ee37...75ae86.jpg

That appears to be a Go/No Go gauge. Its not a 6.5 Grendel chamber drawing.

Here is a link to the drawings: http://www.65grendel.com/forum/showthrea...l-Drawings