I owned one of the first, back when they had a blue receiver, and you could get any gauge you wanted, as long as it was a 20. I bought mine used. Neither barrel would put the shot charge anywhere near where you were looking. In 20 gauge, it was as least as heavy as my Dad's Silver Snipe 12, a gun that shoots exactly where you are looking. Nothing ever broke on mine, but, I didn't use it much at all after I figured out I couldn't hit anything with it. I got rid of it a few seasons after I got it.
The 28s really do handle well, from the half dozen or so I've seen in shops over the years, but, I've never fired one. It seems like gun shops value them far out of proportion to what the market thinks they are worth.
Best,
Ted