Did this on a bolt gun. Its outside can is cerakoted, a thick and durable finish that reduces … With an average reduction of 41 dB, it’s easy to see why so many people enjoy shooting this caliber with a silencer. Not too shabby! I keep thinking about turning my 10.5" 5.56mm AR pistol into a .300 Blackout. Relative Sound Pressure Levels in Decibels (dB) ... 140 dB 133 dB 132 dB 126 dB 116 dB 113 dB 111 dB 97 dB Remington ZOO LTR Unsuppressed Firing .308 Federal Gold Medal Match 168gr BTHP AR-15, 16" Barrel Unsuppressed Firing 55gr FMJ Glock GIZ 9mm Pistol Unsuppressed Firing Remington UMC 147gr ammo Walther P22 .22LR When fired unsuppressed, the .22LR rounds came in at an average of 155-161 dB, just under the unsuppressed H&K MP5. A silencer must reduce the sound pressure level by at least 20 dB(A). Quiet but hard to give a comparison. It is important to know that a reduction of 6 dB(A) already means a halving of the volume. Action noise from something like an AR will add a lot of sound at the ear over a bolt gun. Supersonic ammunition produced a muzzle signature of 134 dB (30.1 dB net reduction), which is similar several decibels quieter than a Sten MK2S or an unsuppressed .22 rimfire rifle firing subsonic ammunition. Have a friend using a 300 Blackout on an AR and reports subsonic to be "much less noise" Probably has more to do with the ear of the beholder. Having been guaranteed by the manufacturer itself to bring the noise from your .300 Blackout rifle to only around 36 decibels, you won’t need any ear protection while firing your .300 Blackout rifles. If you are shooting with your buddies, the noise level of your gun with this suppressor mounted on will surely amaze them. Here are a few examples for better understanding: In a quiet room you have a sound pressure level of 20-30 dB(A) A normal conversation has 40-60 dB(A) The TV at room volume has 60 dB(A) Tags: 300 BLACKOUT, 300blk, Subsonic, supersonic When we last left you , the discussion of choosing either subsonic or supersonic ammo for your 300BLK defensive weapon was in a full-on firefight. The suppressed .300 BLK I've heard was at the range, so I had muffs on. Over the next few weeks & months, we'll do a lot more testing with this round - and we'll get setup with some longer barrel lengths as well. The Gemtech HVT-QD Suppressor is also one of the best 300 Blackout suppressors that provide noise-reducing high-quality 30db. The suppressed SIG P226 conversion gave us an average of 120-128 dB for all ammo tested. Sounds about like a .22 LR. My experience, the bullet doesn't make the "sonic Boom" but there is still the noise from the bullet leaving the barrel. This is also the sound level where … Unsuppressed: 163.1 dB; Suppressed: 129.9 dB; The average reduction using the 762-SDN-6 suppressor was just over 33 dB. All I can picture in my mind is a frequency somewhat lower than 5.56 and dB level less than .308, but that is still a pretty large ballpark. What sort of sound levels should a person expect from a non-suppressed 16" .300 BLK carbine? It brings the sound level even without ear protection. Some of you stated that you would pick heavier and quieter rounds to preserve situational awareness and communication abilities. The new SOCOM300-SPS is the quietest suppressor ever built for 300 Black Out (subsonic and supersonic), .308 and 300 Win Mag. Like 300 Blackout ammunition, it had the ability to be loaded to subsonic or supersonic levels and it would fit in a standard AR15 action and magazine. I understand the .300 was developed to burn efficiently in an 8.5" barrel. I can say that my .22 bolt gun with gemtec subs and a SiCo Sparrow on the front sounds like you dry fired it.
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