Anybody know what the radius of a Rock Creek #3 or Shilen #3 sporter barrel is? I'm trying to find a barrel that has a similar radius to a PACNOR #2.

No clue but do know that one dropped right into a stock from McMillan inletted for a Shilen number 3 so you might check the radius on their site.

When you say radius sorry to have to ask but what exactly do you mean?? I have a #3 Shilen that I'd be happy to check for you but let me know the exact spot on the barrel you want me to measure and I'll do it when I get home. Sadly enough the rifle is right now sans stock so its easy to check any of the barrel.

By radius, if you mean shank diameter, 1.250" max, generally 5 or 10 thou smaller after polishing.

Sorry guys for the confusion....I'm referring to the "curvy" part of the barrel from the end of the shank to the start of the taper toward the muzzle.

I'm referring to this part:

0.815