Buckslugger,
I think there is interest in the round because it is easy to create in a Handi and one can (not necessarily will) think about hunting deer with it.
I would own a 357 Magnum barrel ( soon, I hope) in order to shoot cheap 38 Specials, and then spend the $90 some-odd to get a 30-30 barrel to hunt deer, should I ever decide to give up the 8x57 carbine.
Anything one can do with the Max in a Handi one can do with a better cartridge in a Handi - except shoot 38 specials. Thus I think-- think mind you--, that not many handloaders are using the 357 Maximun handi-rifles in the deer woods.
Just my .02 - might feel differently if I already had a 357 Max.
Harold