Yep, we can do it. We can work with a barrel that's already been chambered and typically don't need to touch the crown either but that last part comes with a caveat that we have tooling to support the nose without touching the bore.
Typically it's in/out less than a week. We have two centers dedicated to turning contours now.
office (at) patriotvalleyarms.com
Last I heard, John had suspended operations while he dealt with some family related business. My information may be out of date.