Ciwsguy's,
For clarification, the slower the rifling twist, the shorter a bullet needs to be to be stabilized by it.
I believe you'll find the long bullet's were either intended for 44 Special or for 44 Magnums with long cylinders, like the Ruger RedHawk, that can accommodate them when the Special crimp groove is used. This was a popular arrangement for silhouette shooting at one time because of the extra powder capacity it makes in the 44 Mag case.