This is incomparable to a pistol or revolvers three to six-inch barrel lengths. I could compare the length of s typical rifle that fires 5.56 caliber at between 15 and 26 inches. Unless you are looking at the 9mm as a carbine round, rifle barrels trump in length dimensions to handguns. Barrel LengthsĪs the cartridge releases the slug, the gas pressure will push it past the length of the barrel. The 5.56 round’s case volume holds approximately 56 grains of smokeless powder as opposed to the 4 grains of a 9mm Luger cartridge. It only makes sense that the larger cartridge has an equally significant amount of powder to burn. The 5.56x45mm NATO cartridge offers about 55,000 PSI versus the 9mm’s 35,000 PSI of internal gas pressure. This pushes the slug out at a higher rate than a 9mm bullet. Reasons attributed to the more deadly energy for 5.56x45mm NATO cartridge include Gas PressureĪ 5.56 mm rifle round has higher pressure gas which results from the imploding and expanding powder. This is possible even at long ranges if you have the proper shot placement. Rifle rounds on the other hand have more kill (kinetic) power. Overall accuracy, however, and long-range terminal ballistics will need to be sacrificed for the terminal stopping power of the 9mm bullet. 9mm slugs will be able to devastatingly wound your target. This causes more damage to soft tissue and bone than the 9mm whose speed threshold is considered to be 1,600 fps.Ĭurrently, some rounds are faster and stable than earlier NATO versions. When a 5.56 bullet travels at full speed, it’s prone to fragmentation and the aforementioned tumbling. This is however in comparison to other handgun rounds, as rifle bullets will cause considerable damage with secondary projectiles. If I am looking at the damage, significant punishment is taken by ballistic gel trying to stop the 9mm round. In terms of energy, the 5.56 round will deliver three times the energy of a 9mm revolver bullet. 5.56mm on the other hand weighs 4 grams and at a velocity of 864 m/s will deliver 1,328-foot pounds or 1,801 joules. The 9mm bullet weighs 7.45 grams with a velocity of 407 meters per second which translates to 455-foot pounds or 617 joules. Knock-down kinetic energy is the punch that you want to be transferred to your target. This is where the bullet gets the bang gaining more out of the barrel (muzzle) speed of about 1,300 ft. The cartridges have the designations 5.56x45mm and 9x19mm, meaning there’s a lot more room for powder in the rifle round. 9mm are also measured by length as well as caliber (width). The actual muzzle departure velocity for 9mm rounds is approximately 4000-foot pounds, which technically suits handgun usage.īullets for the 5.56 NATO cartridges weigh 62 grains and will leave the muzzle at speeds of 3,200 fps.Īs the main standard NATO rounds, the 5.56 vs. 357 magnum load, and for a handgun round, this is hot. This makes it similar in ballistics to a heavy. The 9mm Parabellum weighs 124 grains avoirdupois, starting at speed of 1,200 feet per second. This is however a misnomer in bullet nomenclature, which measures the width of the slug rather than cartridge length, dimensions. One of the feelings any person might get is that 9mm is bigger than 5.56mm cartridges.
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