The .300 Whisper is the precursor to one of my favorite rounds the .300BLK. .300 Whisper will safely fire in a .300BLK firearm.That’s JD Jones for you, had his .375JDJ for my Contender back in the day, and was lucky enough to be around him and his staff when he was working on the 300 Whisper, one of the great firearm innovators.
I actually shot one of the prototype AR’s when it was in the early stages of development, also in a barrel for the contender pistol.The .300 Whisper is the precursor to one of my favorite rounds the .300BLK. .300 Whisper will safely fire in a .300BLK firearm.