I've never used them, but recoil has never been a big issue with me, and I shoot a Handi .45-70 pushing a Rem 405 to 2000 fps. All I know about them is what Remington says. They claim they kill as well as a standard load. I have a grandson who's a lot bigger than I am, but is a recoil whimp. He uses my 7mm-08 Handi, and he's fine with 140 gr. factory loads. If I didn't reload, I'd use a standard factory load with a lighter bullet. Lets say a 120 instead of a 170.
I think I'd prefer to use a slower, fatter bullet and get a clean kill with less recoil. For example, my .357 Max, .445 Supermag and .38.55 loaded to 1500 fps, or there abouts, will kill well and not punish you. I shoot all three a lot faster than that and I don't notice the recoil.
Pete