Big game ammunition: grams or grains?

Veröffentlicht am 30 Juli 2020
Autor Adrien Koutny
Ammunition weight is key. It impacts on the trajectory of the bullet and how well it penetrates the game. However, it can be problematic to work out, insofar as two measurement systems coexist: the European system and the American systems. In the United States, where distance is calculated in miles and temperature in degrees Fahrenheit, bullets are weighed in grains. In Europe, which uses the metric system, ammunition weight is given in grams. Here are the facts you need to know to express in grams ammunition given in grains, and vice versa. 1 grain = 0.0648 grams 1 gram = 15.4324 grains

To convert into grams

So, to convert into grams the weight of ammunition given in grains, you just need to divide the value in grains by 15.4324.


Browning BXR 30-06Spr 155 grains

  • 155/15.4324 = 10.04 grams

Browning BXS 300WM 180 grains

  • 180/15.4324= 11.66 grams


To convert into grains

To convert into grains the weight of ammunition given in grams, divide by the other value, 0.0648.


Browning BXC 308Win 10.89 grams

  • 10.89/0.0648 = 168 grains

Browning BXC 270 Win 9.40 grams

  • 9.40/0.0648 = 145 grains

Remember these formulas so you can compare different ammunition weights efficiently and quickly.

Best of luck!