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Ammunition

World’s Fastest Handgun Cartridge – or Not? The 7.5 FK BRNO

7.5 FK Fastest Handgun Cartridge

FK Brno introduced a new cartridge and pistol system a few months back, and some are calling it the fastest handgun cartridge made. But, is it really? Leaving out the handguns developed to fire traditional rifle cartridges, is the new cartridge/handgun combination the speediest on the market?

Cartridge Basics

The new FK Brno cartridge is officially called the 7.5 FK. It is a bottleneck design that is not based on any existing cartridge cases, so don’t expect to make your own with existing brass.

The 7.5 FK has a 7.8mm diameter bullet (roughly .30 caliber) with an overall cartridge length of 35mm. The case length is 27mm long.

7.5 FK Cartridge

As it was developed by FK Brno, a company located in the Czech Republic, the cartridge was standardized under Commission Internationale Permanente pour L’épreuve des Armes à Feu Portatives, or C.I.P. for short. This commission tests small arms and ammunition and sets certain safety standards. Although not a perfect comparison, C.I.P. is similar to the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) in the United States.

According to FK Brno, the design of the 7.5 FK began in 2010 when the company was approached by a customer that wanted a system to bridge the gap between existing handgun and rifle performance. Although the company does not identify this client, it appears that the cartridge was intended for military use.

Development parameters included:

  • the cartridge should be fired from a typically sized/shaped pistol,
  • using the pistol at 100 meters, the rounds should group within a 10 cm x 10 cm box, and
  • recoil should be no more than that of a .45 ACP +P cartridge.

Ultimately, the client did not pursue the design, but the company continued its development for the commercial market.

Fast…But Fastest?

In the company’s advertising, FK Brno states the new round has a muzzle velocity of 2,000 fps with a 100 grain bullet. Without reservation, that is impressive from a duty sized handgun.

But, is it really the fastest? Let’s take a look at some currently manufactured handgun ammunition.

5.7×28

One of the obvious cartridges to check is the 5.7x28mm developed by FN Herstal. FN developed the round to be fired from both handguns and PDWs – a mission that is similar to the original design inspiration for the 7.5 FK cartridge. Although I’ve seen 5.7×28 ammunition rated at velocities in excess of 2,000 fps, I’ve never come close to those numbers from a handgun.

For example, the SS197 SR round with the 40 grain Hornady V-MAX bullet only measures an average of 1,683 fps across my chronograph when fired from the company’s Five seveN pistol. Likewise, the American Eagle 40 grain TMJ load from Federal averages 1,638 fps across my chrony. Military loads may do better, but I’d say the 7.5 FK is likely faster.

9mm

Interestingly, the oft maligned 9mm is capable of more than 2,000 fps from normal handguns. I’ve extensively tested the Civil Defense line of ammo from Liberty Ammunition. With a 50 grain hollowpoint bullet, I measured 5 shot average velocities in excess of 2,000 fps with a range of pistols:

  • CZ P-07 Duty: 2,015 fps
  • Glock 17, Gen4: 2,087 fps
  • Glock 19, Gen2: 2,069 fps
  • Glock 19, Gen4: 2,025 fps
  • Glock 43: 2,028 fps
  • HK VP9: 2,057 fps
  • Springfield Armory XD-S 4.0: 2,001 fps

While Liberty Ammunition might be a niche load company, I daresay the 7.5 FK is a niche caliber so I believe the comparison is fair. Of course, the 7.5 FK is very impressive as its driving a bullet that is double the weight of the one used in the Liberty Ammunition round to roughly the same speeds.

Of course, one could also argue that obsolete cartridges like the .357 Maximum and .475 Wildey Magnum could also surpass 2,000 fps by loading a lighter bullet. In fact, both of those cartridges would likely blow past the 2,000 fps threshold with a 100 grain (or heavier) bullet.

.460 S&W Magnum

This monster cartridge has loads from Hornady and Winchester that are rated at or above 2,000 fps. Smaller ammo manufacturers may have a few more. However, I am unaware of any semi-automatic pistol chambered in .460 Magnum.

.221 Fireball

If any handgun caliber deserves the “fastest” label, it might be the .221 Fireball. Developed for use in a bolt action handgun, the .221 Fireball threw lead in excess of 2,500 fps. Although the original Remington x100 is no longer made, ammo is still available from Remington, Nosler and others.

Currently manufactured loads are rated at up to 3,200 fps. I suspect that those numbers may be from a rifle length barrel, but even so, I would expect handgun length barrels to well exceed 2,000 fps.

Of course even the Fireball can’t touch the theoretical 25,000 fps claimed in a patent application from Smith & Wesson. Even assuming that was a typo (read the article), a 2,500 fps revolver cartridge is nothing to sneeze at.

So, is the new 7.5 FK the “fastest” handgun cartridge. Strictly speaking, no. However, speed is only part of the equation. I wouldn’t classify the .221 Fireball or .460 S&W Magnum as self-defense or combat cartridges in a normal context – something the 7.5 FK appears to have been designed for.

While Liberty Ammunition is able to push the 9mm beyond 2,000 fps, the 7.5 FK is designed from the ground up to do that. Who knows what limits others could push the 7.5 FK to?

What About Energy?

Bullet energy is another thing we can measure in an effort to predict the usefulness of a given cartridge. While I do not think bullet energy equals “stopping power,” I do believe energy plays a role in the terminal effectiveness of a round. Energy levels are also used by some hunters as a rule of thumb when deciding what cartridges may be suitable for what kinds of game.

7.5 FK shot in ballistic gel

A 100 grain bullet moving at 2,000 fps generates about 888 ft-lbs of energy. That is extremely impressive from a handgun. So, how does that compare the the above mentioned cartridges?

 

bullet weight (grains)

velocity (FPS)

energy (ft-lbs)

7.5 FK

100

2,000

888

5.7x28 - FN SS197 SR

40

1,683*

252

9mm - Liberty Ammunition Civil Defense

50

2,025*

455

.460 S&W Magnum - Hornady Custom FTX

200

2,200

2,150

.221 Fireball - Nosler Custom Ballistic Tip Varmint

40

3,200

910

* measured

Compared to the 5.7×28 and 9mm loads, the 7.5 FK generates significantly more energy. If the felt recoil is that of a .45 ACP +P, then that might be a good trade off for many people.

What is also impressive about this cartridge is that at 100 meters, the bullet is still able to deliver more than 500 ft-lbs of energy.

The Guns

7.5 FK Field Pistol

Ok, so FK Brno has an interesting little cartridge, but its all for naught if there isn’t a reliable gun from which to shoot them. Enter the 7.5 FK Field pistol.

The pistol is a single action handgun that uses a tilting barrel and holds 14 rounds in the magazine. It has a 6″ barrel and weighs just under three pounds. The rear sight is designed to be easily replaced by a Trijicon RMR sight.

According to FK Brno, the new 7.5 FK Field pistol is an entirely new design with a special recoil attenuation system that has been patented by the company.

7.5 FK Recoil System

The company has not offered specific details on how the system works, but has provided the graphic above  comparing a standard recoil system with their new system.

Proprietary Pricing

Right now, the 7.5 FK pistols are not being imported into the United States. However, American Rifleman reported that the company was in negotiations with a Florida-based importer to bring the guns into the country. There are several importers here in Florida, but two large ones immediately jump to mind: Century Arms and EAA Corp.

Of course, all of this is pending BATFE import approval.

most expensive pistol

The real problem for this gun and cartridge is the rumored price. According to an article in the American Rifleman, the gun “…could be well north of $5,000.” If that is so, I do not expect many of these guns to sell.

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Ammunition

American Eagle Syntech Ammunition

American Eagle Syntech

Federal Premium will introduce a new line of ammunition under its American Eagle brand at the SHOT Show. Called Syntech, the new ammunition uses a polymer jacket instead of a more traditional copper one.

The new ammo will be offered in three handgun calibers at launch: 9mm, .40 S&W and .45 ACP. Bullet weights will be typical for the caliber: 115 grains for the 9mm, 165 grains for the .40 and 230 grains for the .45.

Using a polymer jacket has a number of potential advantages for the company and the shooter. First, Federal may be able to manufacture these bullets for less money than if the company used a traditional copper jacket. This can work out to be lower prices for the consumer.

Secondly, by using a polymer jacket, there can be less fouling of the bore. Plain lead bullets can leave quite a bit of residue behind that is tough to scrub out. Copper jackets reduce the fouling, but copper is still tough to remove from a bore. Any polymer left behind is likely to be easier to remove from the pistol’s barrel.

Another potential benefit of using a polymer jacket is a reduction in “splash back” when shooting steel. Shooting steel targets is both fun and useful as a training tool. However, one of the risks involved bullet shrapnel bouncing back at the shooter. Even when operating at supposedly safe distances, I’ve seen part of a copper jacket come back and strike a shooter just above the eye. In theory, a polymer jacket will not rebound off of steel in the same way that copper would.

American Eagle Syntech ammunition is not the first time the company has used a polymer jacket. Federal used a polymer jacket on its popular Nyclad line of ammo many moons ago, and still does on the modern Nyclad .38 Special rounds.

For these loads, Federal used a soft lead alloy that would readily expand at even low velocities. However, copper jackets would inhibit expansion, and bare lead would leave a lot of gunk behind in the gun. To solve the problem, a polymer jacket was developed.

While the Nyclad line was eclipsed by other defensive ammunition lines, I am not familiar with any problems with the ammo caused by the polymer jacket.

I do not have any word on pricing yet for these rounds. As I get additional information leading into the SHOT Show, I will update this article.

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Ammunition

HPR Black Ops Ammunition

HPR Black-Ops Ammo 45 ACP

Using lighter-than-typical bullets, the new HPR Black Ops ammunition promises to deliver superior accuracy and “unparalleled takedown force.” Initially, the Black Ops ammo will be offered in 9mm, .40 S&W and .45 ACP. Another load in .223 Rem is said to be available soon.

According to HPR, the bullets used in the new ammo are Open Tipped Frangible (OTF) projectiles. The OTF bullet has a powdered metal core with a jacket. The jacket and core are designed to separate when striking soft tissue, yet hold together and track straight when encountering an intermediate barrier such as auto glass, sheet rock, and car doors.

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Ammunition

Win 300 BLK Ammo from Lehigh Defense

Lehigh DefenseFrom Lehigh Defense:

Lehigh Defense Offers Multiple Chances to Win Special Edition “300 Game Changer” Promotional Packages

Lehigh Defense, the premium ammunition and bullet manufacturer known for their innovative ammo and bullets, is working with top industry bloggers to offer readers multiple chances to win special edition “300 Game Changer” NRA promotional bullet and ammunition packages.

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Ammunition

New Hornady Custom Lite Ammo

Hornady Reduced Recoil Ammo

Hornady announced the addition of several new products at the 2014 SHOT Show in Las Vegas. Hornady has earned one of the finest reputations in the industry for producing some of the most accurate and high quality ammunition on the market. These new additions look to add to that reputation and open up new possibilities.

One of those new products is the Custom Lite line of ammunition, which claims to reduce recoil 25-40% from standard loads, as well as reduced muzzle blast. Using slightly lighter bullets and modified propellants, Hornady claims a significant recoil reduction can be accomplished. This line is a great way to introduce new shooters, those shooters with smaller frames, or shooters with physical hinderances to larger caliber rifles that they would likely be prevented from shooting with standard cartridges.