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Old February 14, 2014, 02:07 PM   #11
Senior Member
Join Date: August 12, 2009
Location: Athens, Georgia
Posts: 2,052
Here is a chart comparing various AR muzzle devices for sound level one meter away from the muzzle.

Here is another chart comparing the noise levels of different muzzle devices at the shooter's ear.

As you can see, the muzzle device makes a big difference.

In my limited, unscientific experience, the .357 magnum out of a 4" model 65 is way louder than my AR.
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