WHAT DOES FN 5.7×28 MM 40GR AMMO MEAN?

The bullet in this merchandise features a Sectional Density, (SD) of 0.209771433046552. SD will be the ratio of the object's mass to its cross sectional space with regard to a supplied axis. It conveys how well an item's mass is dispersed (by its shape) to beat resistance along that axis.The 9MM ammo is among the most utilized ammo in United states