Hey, that sounds great! I'm interested in your impression of the gun when you get it home, I've never seen one in person. I keep hoping to find one for somewhere under the $1K mark that most seller's seem to want, but haven't found one yet.
I imagine that it will fire the .44 Mag just fine. Although because of the jump to the forcing cone, the forcing cone may not be too happy after a while, if that's the round that's mainly used. Hard to say. If it were my gun, I'd probably stick with the SM ammo until I could cut down & load some Rhino brass.
That's just my opinion though, I try to only run the ammo the gun was designed for, even with .357's & .38's.
I've only run 6 rounds of .44 Mag through my .445 SM, just to feel the power difference.