223 AR, which causes them to build a 300blk next. In one of my AR's, I don't have an adjustable gas system on it, so I run an 8 oz buffer to slow stuff down, If I could have made it 10oz, I would have.Ī lot of people are usually not happy with the level of suppression on a. You really should be running a heavier buffer also. If you have an adjustable gas system, turn it down until the gun stops cycling, then open it up just enough to make it cycle reliably.
If you are going to start running a suppressor on your AR and are running it with supersonic loads, please keep in mind that you are increasing the backpressure on the system a lot and if you don't make a couple of changes to your rifle, you can shorten its life significantly. The bullet breaking the sound barrier is louder than 140db which is why most like to shoot subsonic bullets to make the platform quieter. 223 with a good suppressor are going to run in the neighborhood of 137-140 db, which is hearing safe, but still uncomfortable to my ears. As a novelty, yes, you can load up a few and keep them around for fun, or showing off at how quiet you can make it, but your rifle will likely be turned into a single shot and you will have to manually cycle the action to load the next round every time. Its likely that it will be almost impossible to get your AR to cycle reliably at all with subsonic loads unless you build the gun for that purpose. I have to ask why you want a subsonic 223 round though as you are turning your center fire rifle into a. He failed to clean all the cutting fluid out of the can during assembly so when I fired the gun during the demonstration the suppressor spewed large volumes of smoke….go figure.First, welcome to the world of suppressors. On a side note: a friend of mine who manufacturers suppressor gave me a can that he had just completed with a new baffle design for this demo. It was during that time we recorded this demonstration video. I spent several years running around the country demonstrating the ammo to numerous state and federal agencies but it was never considered anything more than a novelty at the time. I was half way there.Įventually I found a couple bullet manufacturers who made 100 grain jacketed lead core projectiles for me, at a cost of fifty cents a piece, that worked quite well. Every bullet went sideways through the plate but the gun cycled flawlessly and even locked the bolt back on the last round.
#Subsonic 223 rounds full
With some small degree of confidence I loaded a magazine full of my new creation, put a suppressor on an M-16 with a 14 1/2” barrel and a 1-in-7 twist, fired a few rounds semi-auto then went full-auto into a thin metal plate at 25 yards.
#Subsonic 223 rounds trial
After some trial and error using numerous powders I came up with a load that gave fairly consistent velocities of 1,000-ish feet per second. Not only was the projectile really ugly but it was slightly banana shape. 224 size die, and made my own 140 grain bullet. So I applied a little redneck-tech and soldered together two of the 70 grain projectiles, base to base, ran them through a. While I had developed a 5.56 load that was accurate and displayed consistent shot to shot velocities, it wouldn’t even budge the bolt of an M-16 rifle. The heaviest projectile I had at the time that would stabilize at subsonic velocities was a Speer 70 grain semi-spitzer. I understood the premise that a heavy-for-caliber bullet was needed but nothing off the shelf was readily available. Back in the late 90’s, subsonic 5.56/223 ammo that would reliably cycle an unmodified M-16 or AR-15 was only a mythical beast, at least in the circles that I ran in.
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