Some of you will be familiar with John Ross's book, Unintended Consequences.
Copyright 1996.
In it our hero remembers a trick with a hollow point .22 and a lighter flints:
Henry lowered the side stand, retrieved the Hi-Standard .22 from the right saddlebag, and extracted three .22 rounds from his shirt pocket. One ought to do it, unless I miss and hit the seat or something he thought as he examined the noses of the .22 slugs. There was enough moonlight for Henry to see that the flints were still in place. He poked one of the homemade rounds into the pistol's chamber and dropped the bolt.
It was a trick Henry had discovered when he was eleven years old, and Walter had been mightily impressed. A cigarette lighter flint, bought in 5 -packs at the grocery store and inserted into the nose of a .22 hollowpoint, made a surprisingly large flash when fired against rock or steel. In 1964, Henry had written the Ronson company, asking for a price quote on ten thousand of the tiny, red, cylindrical flints, packed loose instead of in those irritating yellow plastic holders. The Ronson company had not been interested in selling them that way, or in bypassing its normal distributors. When Henry had bought these at the Walgreens in Indianapolis, he saw that they still came packed five to a yellow plastic card.
In the sixties lighter flints were available only in packs of five. In the nineties they were still only available in packs of five.
Today you can buy a pack of 100 for $7 with free shipping if you're subscribed to Amazon Prime.