Thread: 300Whisper in the AR-15
View Single Post
  #8  
Old 03-12-2010, 11:45 PM
Colohunter's Avatar
Colohunter Colohunter is offline
Senior Member
  
Join Date: Jun 2008
Location: CO
Posts: 157
The 1680 burns pretty clean, not much different than most powders. My upper is completely stock from M1S. I haven't changed gas port or anything like that.
Reply With Quote