Does anyone have any experience or opinion on the .321 GNR?

Like many on the forum, I have a so-called "616" built on a model 66 frame chambered in .327 Federal Magnum with an auxiliary blued cylinder in 7.62x25.

I'm considering having another cylinder chambered in .321 GNR. The cartridge is one of Gary Reeder's creation and is essentially a .357 necked down to .32 caliber. I have a spare model 53 cylinder rolling around disused waiting for the right project.