Fiocchi Ammunition Range Dynamics, 5.7X28MM, 40 Grain, Full Metal Jacket, 150 Round Box 57FMJ40 The newest extension in the popular Fiocchi Range Dynamics line is now available in a bulk pack. This 5.7 cartridge is a 40-grain, full metal jacket projectile bundled in a 150-round package. Another in a line of 5.7x28mm ammunition unmatched in the industry!