Help with some Barrel identifiers

[Helka]

Scored this at the switzer auction and just received today. Based on what I could decipher it’s 1:10 6 groove chrome moly. Does the 3 mean it’s #3 contour. I checked the site and I’m 90% sure it does but just want to confirm. The end on the barrel measures .616 and not .625 as listed for #3.

 

[Blastattack]

Barrel contours are not precise because they have no need to be. That difference is literally two sheets of paper, maybe three. Also, the muzzle diameter of a blank is completely irrelevant as you are supposed to remove the last ~2" of barrel anyways before use. It's probably right around 5/8" diameter 2" back from the muzzle.

 

[scout]

Gunsmith's will cut the end off of the barrels when they fit it to your action. What's the diameter 1 inch from the end?

 

[Helka]

Ok thanks. Close to .625 1” down. Closer to .650