We recommend using standard white lithium grease on the outside diameter of the piston. If you’re using a booster system (piston with the spring) make sure to keep your piston clean and lubricated. Our article How to Prevent Suppressor Walk Off goes over these solutions and features a video showing them in use. Some people will put o-rings on their barrels to stop walk off, but we DO NOT recommend using o-rings on barrels as they throw off alignment and can cause strikes. We have found that left hand threaded barrels have less walk off than traditional right hand threads. Wrapping the threads of your barrel with teflon tape/plumbers tape drastically reduces walk off and is a cheap and easy solution. We recommend making sure the suppressor is tight in between magazines to prevent this. Suppressor walk off occurs when the suppressor loosens itself from the threaded barrel while firing. The most common reason for a strike on a pistol can is due to “walk off”. On top of that suppressors direct the firearms blast forward and away from the shooter to help prevent concussive hearing loss. Now when you factor in using your traditional hearing protection, you’re all the way down to 128.5dB. Our Micro30 even in it’s short configuration (5″) will bring that rifle down to right about 140dB (at the ear). This is where suppressors come to the rescue. Mark Kuczka from Accurate Ordnance wrote a great article going over this, check it out here. This occurs from the concussion of shooting going through your facial bones to your ear drums. Even with hearing protection your rifle is still at 153.5dB, which is well above hearing safe! To top it off, if you’re using a muzzle brake, short barreled rifle or shooting in confined spaces (barricades, indoors etc.) you’re experiencing concussive hearing loss. Now a good pair of hearing protection has a rating of 30 NRR (Noise Reduction Rating), when you convert this to decibels it comes out to 11.5 of decibel reduction. Keep in mind this is only for 1 shot at 140dB per 24 hours, the second shot alone can cause hearing damage. Have you ever noticed that even if you wear hearing protection your hearing is declining over time? A large reason is that traditional hearing protection isn’t capable of reducing sound to safe levels for most firearms.Ī rifle is around 165 decibels (dB) (decibels are essentially a measurement system for sound levels), the common “hearing safe” standard you’ll hear is 140dB for one shot in a 24 hour time period. The ultimate competition/match shooting round and the quietest subsonic pistol round out there.The fact that suppressors reduce the sound of a firearm is a well known, but how much of a difference they make in protecting your hearing is usually overlooked. These will cycle suppressed or un-suppressed for pistols and un-suppressed in all platforms for a super light recoil. These heavyweights were delightful to shoot, so if you’re looking for soft-shooting, hard-hitting bullets, give them a try. So, if you are like some folks who prefer the recoil impulse of heavy bullets because it feels more like a push compared to the snap of light weight bullets. Rounds generally must achieve a power factor of 120 or 125 to qualify for Minor power factor scoring, depending on the sport (IPSC, USPSA, IDPA, Bianchi Cup), and heavy bullets are said to be more effective at knocking down steel plates even when they are at the same power factor as lighter bullets. Another advantage to heavy bullets is their reported enhanced reliability in taking down steel targets used in various practical competitions. Heavy bullets in 9mm are not just for suppressed guns. That said, 147-grain bullets, which travel around 1000 to 1050 fps from the typical pistol barrel, are not bound to break the sound barrier, either, though some might at some temperatures and from long barrels. In fact, most 9mm ammunition with 165-grain and heavier bullets are use for this purpose. That makes them a good choice for suppressed guns as they will remain subsonic and won’t produce the “crack” sound of little sonic booms that faster bullets do when they break the sound barrier. Advertised speeds for our 165-grain bullet are around 880 fps or less from pistols and are not likely to reach the speed of sound even from the longer barrels of submachine guns and carbines. Why such a heavy bullet? What do 165-grain bullets do that a 115-grain bullet can’t? The heavy bullets are slower and won’t break the sound barrier, which is 1125 feet per second at 68˚F.
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