I have one here, I've been on the fence with parting with it, but I do have a second barrel i can use for my needs, get back to me.
If/once I list this on another popular forum; it will be gone.
I checked and my barrel is a 280AI - it's a CM 24" Shilen 9-twist in a Rem standard sporter contour still on the receiver - started a project with it and never finished.