this are the same bullets used for the common smooth bore airguns of the time but with a primer in the base.

I know a dandy/airgun collector who take the liberty to outshot other guys with modern airguns for fun on competitions using a vintage smooth bore and original spitzer bullets or "spitzkugeln".
it not enough to compete with the first line but they shoot so good you can win against the common shooter with modern material.

he say its fun to watching them when he comes with his over hundred years old airguns,laughing when they see what it is. this stops when he shoot better then the other guys.