View Full Version : Short barrel 300-221
RWBlue
04-16-2006, 03:35 PM
I am looking to do a SBR AR-15 project in 300-221. A very short 10-12 inch barrel appears to be best for my project, but I don't know the balistics for 300-221 with a short barrel.
How short of barrel is too short?
gt3499a
04-18-2006, 01:03 AM
mine is 11.5" and seems to be about right. I wouldnt want to put the suppressor any further forward than that for ballancing purposes.
8" is the shortest that I know of with a 4" gas port possition.
makes me wonder if I could make up a blow back 300 whisper with a 4" barrel. Would have to fix the bolt to prevent rotation and attach weight like a 9mm carrier. It would then be unable to handle supersonic loads. My standard load is 8gr of h110 with a 180gr flat based bullet. Wouldnt get as much gas in the face that way. Might have to bake this theory a while longer.
good luck
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