I have a .30 M1 Carbine barrel for my Contender that T/C's Custom Shop did about 3 years ago.  It was a shooter right out of the box.  My favorite bullet is the RCBS 30-115 cast over 5 gr of Accurate#5 or 3.6 gr of Red Dot.
The Custom Shop is closed for the time being.  I had another barrel made and it was a mess,poor workmanship. The last 3 barrels I have bought have been from Match Grade Machine and I have been as happy as a clam at high tide.