Larry, I caught the bit on the re-pro 28ga barrels being on an O-Frame myself. I hope it's just a typo. if they are making the .410 barrels on a OO-frame surely the 28's are on the OO-frame also.

As far as the re-pro .410 barrels go. Even if they are a bit heavy this would be a fairly inexpensive way to have a .410 re-pro. They made very few .410 barrel sets and I haven't seen one of the 28/.410 combo re-pros sell for less than $10K for several years now.