I have the 17 hornet in a CZ 527, it is a really usable cartridge. I have made brass out of 22 hornet and it is not difficult, might not stand as much pressure as the regular 17 hornet brass but is very usable. I own or have owned the 17 Remington, 17 fireball, and now the 17 hornet, the hornet will be the last to leave.