![]() ![]() Zeroed for 100 yards, you’re at 10″ low by about 275. ![]() It generates a bit more energy at the muzzle than 223 and uses sane speeds, so I think it’d be a better close range deer cartridge than the 223. Very similar to ballistics on the 7.62×39, but lagging in power at 100-150 yards. It’s important to separate the 110 grain supersonic round vs the 200+ grain subsonic rounds due to their very different ballistic profiles.Įffectively, it’s a 100 yard cartridge for hunting deer. ![]() 223 magazinesįor a civilian shooter, getting into 300 Blackout when you already have an AR-15 is pretty easy: you can buy a dedicated upper to have some flexibility, or switch to a 300 Blackout barrel for a permanent mod and you’re done. The 300 Blackout was designed with a few things in mind: ![]() If only we could get 7.62×39 performance in an AR-15… And then there’s the case taper: which enables great semi automatic reliability but doesn’t work well with the straight magwell and magazines of the AR15. The case head is wide enough that you give up quite a bit of metal on bolt lugs after hogging out the bolt head. 30 in the AR-15? Some manufacturers offer AR-15’s that run 7.62×39, but that cartridge isn’t the best for the AR-15. The AR-10 delivers a lot more power but it’s heavier, gives up magazine capacity, isn’t nearly as common or standardized as the AR-15 platform, and the case capacity is a bit of a waste if you want to run subsonic rounds. Within the Armalite family, there’s the AR-10 in. Let’s dive into the 300 Blackout as it performs against the. It’s easy to convert AR-15’s to and easy to form cases if you’re into reloading. Delivering similar ballistic performance to the 7.62×39, but using a slightly lighter bullet, the 300 Blackout alleviates some hunter’s concerns around bullet mass on game AND makes for a handy suppressed round in an AR-15. Hearing loss is not fun and can be prevented.The 300 Blackout, sometimes called the 300 AAC Blackout and somewhat similar to the 300 Whisper®, is what happens when you want an easy 30 caliber conversion for your AR-15. LAWSUITS HAVE ALREADY BEEN RECOGNIZED FOR GUNFIRE NOISE THAT HAS RESULTED IN HEARING LOSS.ĪLWAYS CONSULT A PROFESSIONAL AUDIOLOGIST, OTOLOGIST, OR OTOLARYNGOLOGIST WITH YOUR HEARING PROBLEMS. BE SURE TO USE ADEQUATE EAR PROTECTION WHEN USING A FIREARM AND BE CAREFUL OF THOSE NEARBY. IF YOU INCORPORATE A PROCEDURE INTO YOUR SHOOTING THAT INCREASES THE SOUND LEVEL, YOU ALSO INCREASE THE RISK OF HEARING LOSS TO YOURSELF AND POSSIBLY THOSE WHO STAND NEAR YOU. AS THE SOUND PRESSURES INCREASE, SO DOES THE RISK OF PERMANENT HEARING LOSS. OUR WARNING IS SIMPLE AND IS IN THE BEST INTERESTS OF EACH SHOOTER. Imagine what the noise levels must be when we incorporate muzzle brakes or porting into firearms, or have a gun explode near the ear due to malfunction. No wonder we hear numerous reports about hearing loss as a result of firearms including acoustic traumas that take hearing completely as a result of one shot. The above averages are for all types of ammunition used in these firearms, and should be considered fairly representative. It should be noticed that this figure of 164.5 dB approaches the practical limit of impulse noise measurement capability inherent in most modern sound level meters. There was also a greater range, from 152.4dB to 164.5dB, representing 12 dB difference, or more than 10 time as much acoustic energy for the top end of the pistol spectrum. Krammer adds that sound pressure levels for the various pistols and ammunition tested yielded an average mean of 157.5 dB, which is greater than those previously shown for shotgun and rifle noise levels. This is approximately 14dB beyond the threshold of pain, and more than sufficient to cause acoustic trauma. Krammer continues to say that shotgun noise averaged slightly more that 150dB. Table-1-SHOTGUN-NOISE-DATA-DECIBEL-AVERAGES. Krammer, Ph.D., Ball State University, Muncie, Indiana has documented the following pressure levels. 357 magnum pistol, which can expose a shooter to 165 dB for 2msec, is equivalent to over 40 hours in a noisy workplace.ĭr. Louis, the damage caused by one shot from a. senior research scientist in charge of the NOISE LABORATORY at the Central Institute for the Deaf in St. Keep in mind that conversational speech is approximately 60-65 dB, and the threshold of pain is considered to be 140 dB.Īccording to Dr. Use this chart as a reference guide for promoting the need of using adequate hearing protection. With the introduction of MUZZLE BRAKES and PORTING, the risks of hearing loss dramatically increase. Download Gunfire Noise Level Flyer–PDF (154k).īelow we have listed critical data describing peak sound pressure levels produced by firearms used in shooting and hunting sports.Ī serious byproduct of this exposure is sensory-neural hearing loss, which cannot be restored to normal. ![]()
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