JR,
This was the link I was referring to in my post on the first page of this thread:
http://forums.accuratereloading.com/eve/forums/a/tpc/f/4711043/m/195100578/p/1Tyler is the fellow in the video you posted..
Jeff Smith chambered a BC to a 45-120 and did load data work on it and posted it at AmmoGuide.com.. You have to be a subscriber (less then $20.00 annually) there to get the data.. Jeff posts at AR under the screen name 'jeffeosso'.. He is a gunsmith and has developed his own line of AR Big Bore Wildcats and knows what he is doing.. He may do the chamber job for you.
His website:
http://www.weaponsmith.com/Good luck with your project and be sure to report back here when it is up and running..
