10000.00 .510 Whisper Victoria Mar 28, 2025 - 6:23 PM Merkwürdigliebe What's .510 Whisper? Back in the 90's, J.D. Jones of SSK Industries invented the Whisper family of cartridges. I'm sure everyone is familiar with .300 Blackout, well.. first it was called the .300 Whisper.
