Back in the '70s and well into the '80's, you needed serious velocity to get expansion. So the really hot 125s ruled the roost, even with fairly primitive JHP designs. The Remington 125 is a throwback to those days and it DOES work, if you can handle the crash'n'boom.
My opinion: I would take a good look at the loads based on the Gold Dot 158grainer. The Speer Gold Dot is a wonderful, advanced projectile design. Proload, Georgia Arms, Black Hills and of course Speer load this to between 1,200 and 1,300fps from a 4" barrel. We know that the Gold Dot 10mm round, 155grains at around 1,300fps, recently performed so well in gelatin that the resulting pictures were downright shocking: 1.25" across. It looked like a freakin' fan blade. Literally. The design, weight, speed and starting caliber are all so close to the 158grain 357 that...well, why not?
Recoil will actually be lower than the wildest full-house 125s.