That extra cost adds up.Īnother drawback directly relates to one of the benefits listed above: recoil. With ammo prices the way they are right now, that definitely makes a big difference when picking up a few boxes here and there. Drawbacks of Using Subsonic AmmoĪmmo that is specifically made to subsonic specifications tends to be more expensive than its supersonic siblings. Subsonic ammo can also reduce some of the recoil, and when you pair that with a suppressor, it makes for a very pleasant experience if you’re introducing a new shooter to the world of firearms. When you pair a suppressor with supersonic ammo, that’s when you’re in for a real treat! The decibel level will be even lower and you’ll really see why the combo of a suppressor and subsonic ammo is so very cool. In a caliber such as 9mm, using a pistol suppressor like the Banish 45 will bring the decibels down to a hearing-safe level even with supersonic ammo. Obviously, the biggest advantage to using subsonic ammo is when you pair it with a suppressor. Anything slower than that is subsonic anything faster is supersonic.Īs a result, subsonic ammo is a specially calibrated load that is designed to travel slower than the speed of sound, thereby eliminating the supersonic crack. With an average air temperature of 68 degrees Fahrenheit, the speed of sound is 1,125 feet per second. The difference between something that is subsonic and supersonic all comes down to the speed of sound. When an object is moving slower than the speed of sound and doesn’t make that crack, it’s considered to be subsonic. Couple Your Suppressed 9mm with Subsonic AmmoĪs was mentioned above, when something breaks the sound barrier and makes a cracking sound as it does so, that object is considered to be supersonic, moving faster than the speed of sound.I'll post if that ends up being a problem once I can get more than one 10-round group from each pistol. My one unresolved issue is the accuracy - since I really would like to get the same accuracy I see with my 124gr loads. Now I'm going into mass-production mode and I'll start running it through it's paces in the next few weeks. Overall, I had a lot of fun with this load. With this pistol, we are actually a bit below the Minor threshold for IDPA & IPSC with the slower rounds.Īs always, the Ti-RANT was just amazing - bringing the overall sound measurements down into the mid-120's!Īs with the M&P, I only had 10 rounds left for accuracy testing and, although the XD(m) did better than the M&P, I'm still hoping for better accuracy results in the future. Once again, this load was easily in the subsonic range - even when shooting with the Ti-RANT, which added 31 fps to the average velocity. XD(m) 3.8 Sound Levels (Suppressed using Ti-RANT 9)
Unfortunately, the grouping wasn't that great but, I just didn't have enough ammo to see if it was the load, or the fact that I hadn't warmed up yet. I fired a single 10-round group from an unsupported, standing position 15 yards. As usual I was amazed at just how loud an unsuppressed weapon really is - even when shooting subsonic ammo.Īfter the sound level meter & chronograph, I only had 10 rounds left to test for accuracy in this pistol - and it just wasn't enough to get a good idea of how this load will do. On the M&P 9, this load was easily in the subsonic range - yet it is still above the threshold for making Minor at IDPA & IPSC matches. Having said all that, here are the results: An AAC Ti-RANT 9 suppressor was also used with a sound level meter to get some suppressed results. The initial testing was done with a 5" M&P and an XD(m) 3.8 with a Storm Lake threaded barrel. I got a chance to take those initial 9mm rounds out to the range and I have to admit that it was a lot of fun! I only had 50 rounds but, it was one of those times where I left with a smile on my face.
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