7.5 FK BNRO Ammo is a completely new proprietary cartridge caliber. The case is 27 mm long, the total length of the cartridge is 35 mm, and the head diameter of the case is 10,8 mm. This caliber is not a necked down version of any other caliber. The case is designed to withstand higher pressures than is usually used in pistol calibers.
Our FK BRNO Ammo will not fit in any magazine, nor will it function in any current production model pistol.
|Muzzle velocity:||610 m/s (2000 fps)||Velocity at 100 m (110 yds):||465 m/s (1525 fps)||Muzzle energy:||1200 J (880 ft/lbs)||Energy at 100 m (110yds):||700 J (520 ft/lbs)||Bullets weights:||6.17g (95 gr) Hollow Point All Copper|
The 7.5 FK BRNO Ammowas initially developed to fulfill a requirement for a new cartridge, by a private customer in 2010. That requirement was addressing the shortfall of hand held and shorter/smaller firearms that were used in their relevant theater of action, and bridged the gap between standard/popular pistol caliber and rifle calibers.
This requirement was subsequently canceled; however, the initial tests showed a very high accuracy potential which prompted the developers to continue with the Cartridge as a target and long range pistol competition round.
The main parameters were as follows:
Cartridge must be short and small enough to be used comfortably in magazine fed / in grip magazine, size of firearm.
Ballistics must be designed for a max barrel length of 150 mm, and projectile must be supersonic at 150 meters. Recoil force should not exceed power factor 230, [ .45 ACP +P ]
Accuracy/ precision at 100 meters must be less than 100×100 mm rectangle.
Projectile permanent wound cavity in Ballistic gel at 150 meters must be minimum 35 mm diameter and 300 mm in length.
CURRENT STATUS AND USE
7.5 FK is C.I.P registered and approved, though it is a proprietary cartridge caliber, with intellectual property rights claimed and registered by FK Brno.
The main use of the caliber is long range pistol target sport, small and medium game hunting.
It comes in 3 types of bullets, Hollow point Banded Frangible nose, Hollow Point Frangible nose and Spoon Tip; all are monolithic and made from copper and copper alloys.