I'm not seeing a problem here. You plan on reloading eventually, you like 4" - what's not to like?
Grips become important with such a revolver, proper fit is crucial. I bought, as have others, 44 mag's used with a box of shells where 6 shells were missing. Owner takes out his new roscoe, shoots a cylinder and puts it away until they sell it.
The reason for so many excellent deals on slightly used 44's is IMO, improperly fitting grips. Hurts to shoot, you won't shoot it.
Check out Hogue, Ahrends and others for a grip that fits YOUR hand. Factory wood grips fit no human as best as I can tell.
Even wood grips work well if they fit your hands.
As to ammo, find some midrange loads for practice, something like a magnum, but a low velocity version. Might be less expensive and more useful than Spl ammo.
Until you reload, you'll be at the mercy of factory fodder, but once you get set up to load, you'll be able to fully exploit your new roscoe.
Just a side note... consider casting too.
