Try here,
http://www.rdth.org/publicHearing200...B%20070417.pdf
And this,
For context -- an increase of 10 dB is roughly a doubling of the sound level, since dB's are measured on a logarithmic scale.
.410 Bore 28" barrel 150dB, 26" barrel 150.25dB, 18 _" barrel 156.30dB,
20 Gauge 28" barrel 152.50dB, 22" barrel 154.75dB
12 Gauge 28" barrel 151.50dB, 26" barrel 156.10dB, 18 _" barrel 161.50dB
.223, 55GR. Commercial load 18 _" barrel 155.5dB
.243 in 22" barrel 155.9dB
.30-30 in 20" barrel 156.0dB
7mm Magnum in 20" barrel 157.5dB
.308 in 24" barrel 156.2dB
.30-06 in 24" barrel 158.5dB
.30-06 in 18 _" barrel 163.2dB
.375 — 18" barrel with muzzle brake 170 dB
.25 ACP 155.0 dB
.32 LONG 152.4 dB
.32 ACP 153.5 dB
.380 157.7 dB
9mm 159.8 dB
.38 S&W 153.5 dB
.38 Spl 156.3 dB
.357 Magnum 164.3 dB
.41 Magnum 163.2 dB
.44 Spl 155.9 dB
.45 ACP 157.0 dB
.45 COLT 154.7 dB
Google can be your friend
