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Advantages of the 5.7 Cartridge and PistolWithout a doubt in my mind, the 5.7x28mm cartridge is an excellent cartridge that offers some advantages. The 5.7 round case and bullet are reduced in size to create what some say is an improved performance to the 9x19mm. The round has a long and slim design with bottlenecked case and pointed bullet, as you can see in the above photo. It is almost 4 times longer than its diameter. This compares to the standard 9mm round which is about 1.5 times as long as wide. The 5.7x28mm round has its center of mass back towards the rear of the bullet than others. So when the 5.7 round hits the target, the bullet tends to tumble or pitch forward and yaw side-to-side, making for a much larger wound cavity. This helps the bullet’s energy transfer to the target more efficiently, with less chance of it over-penetrating out the target to whatever is behind it. So, Larger Wound Cavity; More Energy Transfer; Less Over-Penetration; More Expansion. Several say the 5.7mm has only a third of the recoil of the 5.6mm NATO and two-thirds of the 9x19mm. The cartridge pressure level is low enough so that the pistol is blowback operated and helps reduce felt recoil.
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