Greetings!
I picked up an ADC M-4 "Slab Side" in .44 Spl., about eight years ago, or so. I've really enjoyed it! At times, I've had Federal 200 Gr. SWCHP's in it, but generally, I just put my handloads into it: Speer Shot Capsules filled with #12 Shot { Great to 8' or 10'}; Ideal #429348, and a midrange charge of Unique { Also good in the older Charter BullDog}; and occasionally a RB load, although they're more for fun.
Recoil? Well, I believe that the weight and barrel length keep it from getting 'carried away' with itself. It has more rearward thrust than muzzle flip; probably a LOT less muzzle flip/angular momentum than a 2" barrel. Although I haven't yet chrono'ed any loads, I would guess that they would perform about as well as my 3" BullDog, perhaps better.
I think that Deringers are a kick, and look forward to the day when I can find a decent, affordable Remington O/U in .41SRF... And, a few "affordable" boxes of South American made cartridges!!!
Be Well!
M.T.Marfield