Until I read the OP's post, I never realized that they made such a thing. I suppose it might be useful like on a trap line for a finishing shot. I did shoot a .22 LR out of my .22 Magnum M24 barrel once and it went bang, though I'm sure never recommended.

My other auto is a .45

The bitterness of poor quality is remembered long after the sweetness of low price has faded from memory