Originally Posted by Swifty52
A couple of good reads here for you.

http://en.wikipedia.org/wiki/.300_Whisper

SSK has some really good videos

http://sskindustries.com/300-whisper-%C2%AE

And just for clarification, the original 300 Whisper was based on a necked up 221 Fireball, not the 223 as is the blackout. Also the whisper is still considered a wildcat.


It is still based off the 221 fireball. There is just more 223 brass out there. It is easier to lop 223 cases off at the shoulder and neck them down than neck up 221 cases.