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5.7x28mm Ballistics Chart

FN 5.7x28mm Box of Ammo

The 5.7x28mm caliber was developed after NATO requested ammunition that had armor piercing and longer range capabilities than 9mm cartridges. The first manufacturers of 5.7x28mm was FN who designed it for use in their FN57 pistol and P90 Submachine guns. Ruger quickly made their own Ruger57 as well. The reason why NATO has not fully adopted the round is because Heckler & Koch lost the contract deal to develop their 4.6x30mm cartridge. H&K being from Germany (a key member of NATO) the entire country rejected the standardization.

5.7 size compared to a U.S Quater
5.7 vs 9mm

40 countries today still used the 5.7x28mm as standard ammunition due to its unique low recoil and long range capabilities. Its has since then went into the civilian market where it has become increasingly popular.   

5.7x28mm Dimensions

What makes the 5.7x28mm so unique is how incredibly light of a round it is. It's only 27 grains which gives it a greater muzzle velocity, allowing it to be a faster and flatter flying round. The high muzzle velocity is what gives it its armor piercing capabilities. Being a flatter flying round, it is also a lot more accurate than 9mm at longer distances. Check out the trajectory chart below. 

Types of 5.7x28mm

Types of 5.7x28mm

Ballistic Gel Test

5.7x28mm vs 5.56x45

5.56 vs 5.7vs28mm

Guns that shoot 5.7x28mm

FN Five-Seven

FN Five-Seven Pistol

Ruger-57

Ruger-57

Kel-Tec P50

Kel-Tec P50

FN PS90

FN PS90 Rifle

AR57

AR 57 Rifle

PSA 5.7 Rock

Palmetto State Armory 5.7 Rock