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. There is a big difference between high-speed, supersonic bullets, and low-speed, subsonic bullets. Regardless of what they hit on the way through, they continued on a straight and very deep path. 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. Flat-nosed bullets with flat bases (a true cylinder) are most effective. 223 THAT WILL BE EFFECTIVE ON LIVE ANIMALS, ANOTHER OPTION IS TO CAST AND LOAD YOUR OWN BULLETS. 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. Don’t waste your money on a self-cycling. Since they use less than 5 grains of propellant, they tend to be very quiet in a suppressed firearm. They are also easy to build for the home reloader. They are available from a number of suppliers at reasonable cost. Subsonic rounds that will not cycle the M16 action are fairly common. 223 bullets need a 7" twist in order to stabilize, and WILL NOT WORK with a 12" twist. They will print better and do more damage upon striking. If accuracy is a problem with a slow twist, simply turn the bullets around and shoot them backwards. Pricing for subsonic and high velocity ammunition that deforms substantially on striking tissue is greater, as the bullets for these rounds are custom built. 223 rounds are available, but they offer little over the. Also includes some Hornet information too) (Probably a little dated as it does not mention ballistic tip bullets. Subsonic and reduced 223 reloads – with discussion on effectiveness and focus on use with suppressors
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