Switching barrels will not cure the problem. A long forcing cone reamer must be used to lengthen the chamber to 2 3/4", the inside of both ends of the ejection port have to be beveled and part of the ejector must be filed back very carefully to allow the shell to come back far enough to clear the front of the ejection port. I am in gunsmith school and I've done two of these conversions with success. It's easy if you have the tooling and the know-how, but I would recommend finding a gunsmith who has done this before.
Hope this helps.