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Posted: 12/26/2005 2:23:56 PM EDT
[Last Edit: 12/26/2005 4:13:38 PM EDT by jaynboom]
I'm wondering if the slower round (7.62 x 39) might have less report when fired from an SBR, when compared to the 5.56 round. Some of the quotes about the report from the AR Pistol forum makes me wonder if a SBR is a mistake.

Has anyone noticed the difference?

Thanks.

Link Posted: 12/26/2005 3:40:00 PM EDT
Are you asking if a 7.62 SBR will have less report than a 5.56 SBR? Because the .308 will have more of a report than a .223. Both are loud with 16" barrels and VERY loud as a SBR.

With a .308 SBR you get a tremendous muzzle blast.

Here is a picture of a HK 51K .308 SBR muzzle blast at night.

http://img230.imageshack.us/my.php?image=hk51k1nk.jpg
Link Posted: 12/26/2005 4:12:54 PM EDT

Originally Posted By UZI4you:


http://img230.imageshack.us/my.php?image=hk51k1nk.jpg



Wow, that's a lot of muzzle blast. I was talking about the 7.62 x 39 actually.

Roy
Link Posted: 12/26/2005 5:08:58 PM EDT
a krink is absolutly painful to shoot without hearing protection.
Link Posted: 12/26/2005 11:13:58 PM EDT
A good rule of thumb is the more powder, the more the blast. A subsonic 230 grain .45 has more blast than a high velocity 9mm etc. Just becasue 7.62x39 has lower operating pressures than 5.56 does not mean it wont rattle your eardums.
Link Posted: 12/27/2005 7:19:46 PM EDT
My New Year's resolution is to go fire the 7.62x39 AR pistol and the M38/M44 back to back and see which is louder. My father says the Mosin is louder, but it's gonna be close!
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