It lends some to believe it was from a double-charge accidently put into the case, but it does have references going back to the 1881 period of time. Ruptured cylinders and dissappearing backstraps can be sypmptomatic of a light-load rupture. The use of low density charges with one of the top 10 fastest powders in the world at half the recommended factory charge weight may work in your gun, but it's risky. It may not work in someone else's gun. Therefore, no one should recommend very light loads, especially of fast burning powders to anyone.
Stuck bullets is another matter.
With very light loads and powder against the bullet, a very mild shot can stick a bullet in the barrel. The NEXT shot can have disasterous consequences, also leading to the cautions against very light loads of any type, but especially of fast burning powders at the other end of the case from the primer. Yesterday, detonation, secondary explosions, or just plain stupid reloading, signaled the breakup of my once beautiful SSK 475 JD Jones. In my last story about the .475 I remarked on its being just plain brutal to shoot. So I went searching for less powerful loads that I could enjoy plinking with.