Sub as is derived from, not subsonic. Forgotton weapons did a video on it, 6.5 CBJ. 9mm casing necked down at the end and with what is effectively speaking a sabot round in the casing.

Ahhhh. Thank you. Now the Ipv over 4 jokes make sense.

Hello, I am apparently an idiot. What is wrong with that IP address that people can tell it’s an immediate phishing scam?