The Sub-X is a jacketed lead-core bullet that can be mass-produced at high speed. High-end expanding subsonic bullets like the Lehigh Defense models are CNC-machined from solid brass or copper in relatively small quantities. This is accomplished in two ways: manufacturing scale and projectile design. In fact, the Sub-X ammo costs less than half as much as the CNC-machined monolithic options from Lehigh and others. The Sub-X launch was hugely exciting because it gave us the first expanding subsonic ammo from a major manufacturer that we could buy and actually shoot without having our wallets burst into flames. Hornady Sub-XĮnter Hornady’s 190-grain Sub-X ammo. Again, these are top-shelf offerings-the component bullets alone cost more than $1 each. Other manufacturers, including Maker Bullets, offer premium monolithic bullets and loaded ammo designed to expand at subsonic velocities. But as good as the Lehigh Defense offerings are (every 300 Blackout shooter should have several mags loaded with the company’s Maximum Expansion ammo), they aren’t cheap, to say the least. Recently, the company added the Controlled Fracturing Subsonic line with two projectile options weighing 168 and 198 grains. Its Maximum Expansion projectile is an all-copper bullet that expands massively at subsonic velocities and typically retains 100 percent of its original weight. Lehigh Defense spearheaded much of the early progress made on bullets designed to be effective at subsonic velocities in tactical situations. However, I have found a noticeable divergence in the point of impact (POI) among different brands of subsonic ammo, so always confirm the POI differences between your training and tactical rounds. This lets me keep my expensive AR500 steel targets on the rifle range but still get the fun of ringing steel in training with my AR. I enjoy shooting these tremendously, since I can shoot my AR in my pistol bay, where I have multiple inexpensive mild-steel targets. Most are loaded with heavy match or ball projectiles that are neither designed nor intended to expand in tissue in a hunting or tactical scenario. Many of the available factory subsonic loads are intended solely for range use. The short version of all this is that times are good for those of us who like to shoot subsonic 300 Blackout ammo. Additional varieties are available from numerous less well-known manufacturers like Engel Ballistic Research and Atomic Ammo. High-end maker Lehigh Defense offers what are arguably the most high-performance subsonic tactical loads for the 300 Blackout. Imported subsonics are available from Magtech, Armscor, Geco and Sellier & Bellot. Remington and Winchester also have subsonic loads in their affordable UMC and White Box lines, respectively. Ammo giant Federal offers an affordable subsonic option in its American Eagle line. Hornady produces factory subsonics like the hugely popular 208-grain A-MAX load in its Black line, and expanding subsonics like the 190-grain Sub-X. With the ability to shoot suppressed 300 Blackout rounds, the market has demanded more options from ammo makers. In fact, the timing of the standardization of the 300 Blackout and the huge boom we’ve seen in suppressor sales in the last decade are definitely related. Veterans Day 2015: Honoring Our Veterans Loading 300 Blackout Ammo
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