In my view, to re-chamber would be to spend several hundred dollars to reduce the 28's value and also take a fine Highway Patrolman forever out of the market
You could trade the 28-2 for a 57 and even add a bit of cash. You still come out ahead in the long run. You can buy another 28 later if interested. Just a thought.
It's up to you, but I'm told that every time somebody modifies a pinned and recessed Smith & Wesson a puppy gets cancer. Not sure if that's true.