Prior to the Blackhawk Eight Shooter there was also a six shot Blackhawk 32 H&R built with a second cylinder in 32-20. I’ve heard of several of those having their H&R cylinders reamed out to 327 FM. It was a part of a special run sold through the now-defunct Buckeye Sports. I wish I had kept the (unaltered) one I sold many years ago. Yes, I would have had it reamed!
Froggie