TAB, you overlook the fact that there ARE "Ruger only"loads, not just in 44Mag, but in 45 LC as well as probably other calibers I'm not aware of.
Your statement that it is due to longer rather than stronger cylinder is foolishness. A longer cylinder means the pressure builds even higher in the fraction of time before the bullet leaves the cylinder, that means that an otherwise equal strength metal would be more, not less, likely to give way.
If you think about it for a second you have to realize I'm right.