I was using them for SD 15 years ago
If the name Tom Burczynski is not familiar, you are either a newcomer or not paying attention. Burczynski is the designer of the Hydra-shok bullet that, in 1985, started a real revolution in defensive handgun ammunition. It's become the standard against which all others are measured, making Burczynski, arguably, the most influential bullet designer of the 20th century.