a quick guide to dB: for every 10dB increase the sound is twice as loud: eg: 138dB is twice as loud as 128dB. at that range any muzzle noise has dissipated and you are only hearing the sonic "crack" of the the projectile in flight.
a quick guide to dB: for every 10dB increase the sound is twice as loud: eg: 138dB is twice as loud as 128dB. at that range any muzzle noise has dissipated and you are only hearing the sonic "crack" of the the projectile in flight.
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