Look...if the cylinder blows apart, it's probably the load. But if the cylinder is intact yet other bits are busted (as apparently in this case) then likely something else is wrong. Somebody at S&W figured this out.
Now. I gotta say it. This is one reason I like Rugers over Smiths.
I'm not sure but I think this gun went off slightly out of battery, OR a heavy load pushed the cylinder slightly out of alignment before the bullet could make it out the front of the cylinder. Either would let the bullet slam into the back of the barrel off-set and do the damage described.
Rugers have a fairly solid latch right at the crane that holds the cylinder in and aligned with the barrel even under extreme conditions. This class of problem seen by the original poster is less likely in a Ruger, including the DA 44Mag varieties.