This is a question for Briley, but will they tube a 20 to a 28?

One of the chambers was bulged and deemed beyond repair by several experts, including John Hosford, Dave Fjelline and Briley. It is a great shooting gun with the 28 gauge short tubes.

Important to note: Briley has to ream out the barrels some to fit the tubes, so I would only do this to barrels which are beyond repair in their current condition

Briley can tube a 20ga down to 28ga. I tried to have it done, but unfortunately the bulge in the barrel could not be reduced, and so they would not tube the barrels.
The remove any dents, and bore roughness so that the tubes don't become "stuck" in the barrels. They also lengthened the chambers to 2 3/4" in the 16ga I had done.

Ed, they will tube a 20 to 28, but the chambers and extractors are a bit fragile and need extra care when using them. Also, heavy loads are discouraged. I have always chosen to tube 20s to .410d, leaving my 28 gauge tubing to the 16 gauge. However, I don't see any mention of fragile 28 gauge tubes on their website. Call and ask.

Thanks Bill.