AKA a booster charge.
Nobody here has made/packed sausage.
When I was a tunnel miner, we used primers for detonators...one stick of Hercules 65% with a delay blasting cap. I would double prime my holes when we used “prill”.
The ANFO was transported to the heading in tanks on the powder car. The “prill” was injected into the drill holes using compressed air. It would really pull a round...IF, we weren’t in water, which was a lot of the time.
Darn stuff let you know where every cut or scrape on your body was...burned like crazy.