With a revolver, especially a lighter one, the recoil from certain loads can unseat the bullets and cause them to jam the cylinder. With my airweight S&W J frame they caution against using bullets less than 125 grain, as the sharper recoil could unseat the ammo or something like that.
AH HA!
Many years ago I was qualifying and a friend next to me on the line was shooting a 357. That danged thing JAMMED. TWICE. On the FIRST round fired. The round went bang and the bullet wedged between the barrel and the cylinder!

VERY not good. All of the energy from the round was converted into heat which got the cylinder HOT. And the cylinder had five more rounds.

The range office was sitting there cussing as he tried to open the hot cylinder. I backed off the line ASAP.
If *** I *** was the RO I would have put the revolver down and had everyone walk away.
He eventually cleared the bullet. She reloaded. Fired. And we did the exercise again.


She got some new ammo after round number 2.

Yours is the first explanation that explains what happened with her ammo.
As an aside. Same Lady. Same Ruger. Same Range. We were firing the night time course for qualifying. The range was in a swamp. The range itself was pretty nice. But it was surrounded by swamp. It was so humid just standing still you were covered in sweat. It was so humid you could see your breath and it was in no way cold. It was SE FLA after all.

We went to qualify and we could not see. Once we put on eye protection they fogged up.


The range officer said take off you glasses if you needed too. We needed too.
That is the first and only time I'll ever shoot without glasses. The lady next to me was short. And I'm tall. She fired and a piece of metal hit an inch or two under my left eye. Stung a bit. If she had been a bit taller or me a bit shorter I think I would look like a Pirate.

Later,
Dan