Firing a live rifle cartridge from a shotgun shell is never a good idea.
Taofledermaus was curious what would happen when a rifle cartridge was shot from a shotgun barrel, so he did something about it.
Watch this video and see the results.
This experiment looks quite dangerous and should never be attempted at home. Let the experts like Taofledermaus assume the risks to his gun, not to mention his own personal health.
The results are actually less than stellar. The cartridges never fired, but instead had the bullet heads pushed all the way into the casings.
But we all were quite entertained by this video, right?