If you intend to speak to Hodgdon regarding subsonic 223 loads, you may want to inquire about heavier bullets too? I'm thinking going heavier would be a benefit to loading subsonic. I've never considered loading 223 subsonic, though I have heard of it. If they list a subsonic load for 223 then I would check with them on it, safest bet imo.
#SUBSONIC 223 RELOADS HOW TO#
If it were me, I would shoot Hodgdon an email about how to proceed. I would definitely do a lot of research first, avoid Kabooms and squibs at all costs. (Probably a little dated as it does not mention ballistic tip bullets.I have never used Titegroup for anything other than pistol cartridges, works great for my 45acp. Also includes some Hornet information too) 223 rounds are available, but they offer little over the. Pricing for subsonic and high velocity ammunition that deforms substantially on striking tissue is greater, as the bullets for these rounds are custom built. If accuracy is a problem with a slow twist, simply turn the bullets around and shoot them backwards. They will print better and do more damage upon striking. 223 bullets need a 7" twist in order to stabilize, and WILL NOT WORK with a 12" twist. Subsonic rounds that will not cycle the M16 action are fairly common. They are available from a number of suppliers at reasonable cost. They are also easy to build for the home reloader. Since they use less than 5 grains of propellant, they tend to be very quiet in a suppressed firearm. Don’t waste your money on a self-cycling. 223 round if you are shooting a bolt-action or another manually cycled weapon – like the newer pump and bolt-action AR15 uppers that are coming out on the market lately. 223 THAT WILL BE EFFECTIVE ON LIVE ANIMALS, ANOTHER OPTION IS TO CAST AND LOAD YOUR OWN BULLETS. Flat-nosed bullets with flat bases (a true cylinder) are most effective. The African hunters of old used solid bullets with noses shaped like a hemisphere (ball end), and these were the most stable of all the possible shapes. Regardless of what they hit on the way through, they continued on a straight and very deep path. There is a big difference between high-speed, supersonic bullets, and low-speed, subsonic bullets. Supersonic bullets should be sharply pointed, with a smooth, streamlined shape that will slip easily through the air because the frictional drag on supersonic bullets is roughly four times that which pulls on a subsonic bullet. It takes a lot of energy to break the sound barrier on a continuous basis. A properly constructed supersonic bullet moving at Mach 3 or 4 has the power, speed and centrifugal energy to easily upset on contact with a live target, expanding and delivering most of its energy in the process. A subsonic bullet will not expand to a significant extent thus it should have a shape that will do the most damage before it leaves the barrel. Fackler's experimentation tells us that this most effective shape will be a flat nose.
When someone pulls together an intensive body of research that leads to an obvious conclusion, we believe them. With regard to a flat nosed bullet, drive a piece of 1/2" diameter water pipe through a wooden two-by-four with a hammer, and you'll see what we are getting at with regard to damage resulting from such a shape. Our research tells us that the most effective bullets will have flat noses and bases, with just enough roundness on the front and rear corners to allow them to be shoved into cases and fed into chambers. A soft lead bullet deforms upon entering flesh and tends to be effective at relatively close range. A sharply pointed bullet does not make for effective subsonic animal control unless it has its tip filed to a 45 degree angle, so it will dive and go sideways like a spoon nose. Jacketed bullets are usually more accurate than cast bullets. Some of the accuracy increase or decrease with subsonic bullets has to do with the way a powder charge obturates or mashes the base of a bullet forward. If the base is not flat the sides will not be supported by the barrel, and will often mash crooked. Indeed, if the forward part of the lead core is too thin and not supported by the bullet jacket it too will flatten out under supersonic acceleration forces during the first inch or two of travel.
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