7.5 FK

7.5 FK
Type	Pistol
Place of origin	Czech Republic
Specifications
Case type	Rimless, bottleneck
Bullet diameter	7.8 mm (0.31 in)
Neck diameter	8.5 mm (0.33 in)
Shoulder diameter	10.8 mm (0.43 in)
Base diameter	10.8 mm (0.43 in)
Case length	27 mm (1.1 in)
Overall length	35 mm (1.4 in)
Ballistic performance
Bullet mass/type Velocity Energy 95 gr (6 g) HP 2,000 ft/s (610 m/s) 844 ft⋅lbf (1,144 J)
Test barrel length: 152 mm

The 7.5 FK is a cartridge[1] caliber.

Development

Proprietary cartridge created by FK BRNO for the FK BRNO Field Pistol.

Although the basic case design and the concept of the cartridge was finalized in 2011, more than 250,000 rounds were fired with at least 15 different case design variations and over 30 different bullet designs were tested over a four-year period before the final cartridge design form was approved for production.

Specification

The case is 27 mm long with a total length of 35 mm, and a head diameter of 10.8 mm. This caliber is not a necked-down version of any other caliber. The case is designed to withstand higher pressures than usually used in pistol calibers.

This cartridge will not fit in any other manufacturer's magazine, nor will it function in any other current production model pistol.

Muzzle velocity: 610 m/s (2000 fps)

Velocity at 100 m (110 yds): 465 m/s (1525 fps)

Muzzle energy: 1144 J (844 ft-lbs)

Energy at 100 m (110yds): 700 J (520 ft-lbs)

Bullet:

HP - HTE/F5M5 Lead Free

6,17g / 95 gr.

See also

• 7 mm caliber

References

1. https://www.americanrifleman.org/articles/2016/5/2/the-world-s-fastest-pistol-75-fk-brno/