Quote Originally Posted by OgenRwot View Post
Yep, and it's a pistol powder as well. However, it's a very voluminous powder so it takes up quite a bit of room in the case. It's designed for revolvers and lever action rifles like the 30-30 etc. It is common practice, however, to use pistol powders in 223 and 308 for subsonic rounds.
Not being sarcastic or smartass,
Serious question:
Why would you want subsonic rounds in 223/308?

you cannot effectively zero or kill anything at range that way can you?
The trajectories would be awful

Asking for my betterment