August 7th, 2017

Fascinating Facts from Norma’s Ammo Academy

Norma web site Ammo Academy

If you haven’t visited the Norma website recently, you should click over to There you will find Norma’s Ammo Academy, a technical resource that provides information on Ballistics, Powder Storage, Barrel Wear, and Bullet Expansion. In addition, the Ammo Academy now links to Norma’s Reloading Data Center, where you’ll find loads for nearly 70 cartridge types including: .223 Rem, .22-250, 6mmBR Norma, 6XC, 260 Rem, 6.5-284, 6.5×55, 7mm-08, .270 Win, .284 Win, .308 Win, .30-06, 300 Win Mag, .338 Lapua Mag and dozens more.

The Ammo Academy’s Ballistics section contains some fascinating technical facts:


  • After the trigger is pulled, it takes around 0.005 seconds before the firing pin reaches the primer.
  • From the firing of the primer it takes 0.0015-0.002 seconds until the bullet exits the muzzle.
  • When the bullet leaves the muzzle, the hot gases surround and overtake the bullet, continuing the acceleration for a few centimeters.
  • Because the barrel is always angled slightly upwards, the bullet’s flight starts about 3-5 cm below the line of sight.

Norma also offers some good advice about Powder Storage:

To maintain the product quality for as long as possible, you have to keep the powder in a suitable place under suitable conditions. Where possible, store the powder at a constant temperature, ideally between 12 and 15°C (54°F to 59°F), and a relative humidity of 40–50%. If the air is too dry, it will dry out the powder, which will cause the pressure to be higher, thus affecting performance. Also make sure that you close the powder container properly afterwards. Cartridges should be stored under the same ambient conditions to maintain their quality.

Norma web site Ammo Academy

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