7.92x24mm and 5.7x28mm gelatin impacts

7.92x24mm and 5.7x28mm gelatin impacts. Shooting tests and bullet evaluation. Penetration and wound cavity compared to FBI demands and mission failures. 9x19mm, 30 Super Carry and 7.62x25mm Tokarev. Special body armor to stop these AP rounds.

These are old test results from around the year 2005 who were done in the Flanders carried out on the basis of the Belgian certificate of recognized person for the development of firearms and ammunition from Rik Van Bruaene. There are no weapons or ammunition parts for sale! This is only an informative blog.

Cal. 7.92x24mm Normal FMJ cartridge
Suitable for pistols , pocket pistols, SMGs and PDWs
Bullet: Hornady FMJ-RN 71 grains
OAL : 32mm
Test barrel lenght : 3 inch = 8 cm.


Block 1 calibration 6.5 cm at 466 fps  /  Block 2 calibration 6.3 cm at 426 fps

20” / 50 cm strait line tumbling penetration total penetration depth 24 inch. This allows with a good shot placement to hit the spine and other vital organs deep in the body even from big and heavy weight adult persons. The 5.7x28mm bullet deviates considerably from its straight path during impackt. Even with a well-placed shot you can never guarantee that you will reach the spine or vital organs deep within the body to neutralize the opponent.

 Penetration depth 24 inch / 61 cm in calibrated bare gelatin.

The 7.92x24mm FMJ bullets are comparable with the .30 Super Carry and the 7.62x25mm Tokarev. As most FMJ rounds they have over penetration according to the FBI ballistic penetration demands.  However the first FBI penetration demands where 12” to 14” in the beginning, later it changed to 14” tot 16” and again later to maximum 18”. The 7.92x24mm caliber was designed to compete with the 5.7x28mm cartridge and to preform also good at midrange for the use in PDWs.

 7.92x24mm FMJ-RN Blue Tip 71 grains

The 7.92x24mm cartridge is quit powerful intend to perform good at midrange but does it really have to push to the maximum when its intend to use at close range? The 7.92x24mm FMJ-RN Blue Tip 71 grains with a reduced powder charge still functions good in compact pistols but haze a penetration depth in calibrated bare gelatine of only 18” / 457 mm. Also bullets with a lower weight around the 57 grains reducing the penetration depth and recoil. This should be more satisfy the FBI penetration limits and public safety compared to a 9x19mm FMJ round.  

While hollow point bullets are banned for civilian personal defense in the most European countries, in the United States they are general used by civilians and law enforcement. The test results of the 30 Super Carry hollow point bullets confirm that even a smaller bullet diameter still can have an significant wounding potential. Also the 7.92x24mm with even a higher velocity confirms this conclusion. This .32 bullet expand to 17.2 mm which is .62 inch. That is significant more then what a 5.7mm bullet can do. Hollow point bullets expand fast and have less penetration at soft body armor.


Where an important role for civil resistance during an occupation was reserved for the 9x19mm caliber with a wide distribution of ammunition, the 5.7x28mm caliber is banned in most European countries. The 5.7x28mm caliber can never fulfill this role of civil resistance and large distribution of ammunition. Most types of 5.7x28mm ammunition can if needed with some small modifications, penetrate soft police body armor. This is not the case with the .32 caliber. The 5.7x28mm pistols have already a great value on the South American illegal criminal market with the aim of piercing the bulletproof vests of police officers.

Flexible body armor to stop AP handgun rounds developed in the Flanders by Rik Van Bruaene. For more info about enhanced flexible body armor contact us.

The 5.7x28mm caliber is already adopted by several NATO countries and also the American firearms industry starts to manufacture different kinds of 5.7x28mm firearms including pistols, carabines and submachine guns. Different types of ammunition are already available on the market.

 5.7mm 2BF bullet impact at bare gelatine

Despite the 5.7x28mm caliber pistols are quite big and not suitable for concealed carry this caliber start to gain lots of users on the American civilian market. Low recoil and the penetration of soft body armor in mind, most people do not care much about the limited incapacitation performances of this 5.7 mm caliber. However, this is a knife that cuts on two sides. On the one side the great popularity of the 5.7x28mm pistols not only increases there appearance and use for personal defense, on the other side it will also increase the appearance of the weak points of this 5.7x28mm caliber regarding to the limited stopping power, problems with premature tumbling and pore penetration. The know mission failures among Special Forces who did use the 5.7x28mm caliber before will also appear among civilian personal defense use. A new Miami shootout failure is on the waiting.

 It is generally know that in a firefight the hands and the arms of the opponent in many cases are first hit before the bullet penetrate the upper body. The resistance of the arm is big enough to start the 5.7 bullet to tumble. This causes a big exit wound in the arm but once the bullet is tumbled base forwards it losses his wounding potential when enters the chest cavity in a slant or base forwards position with as result insufficient penetration and a small wound cavity not bigger than this of a .22LR bullet. This simple setup of two block ballistic gelatin the one 30 cm from the other provoke already a premature tumbling.

 7.92x24mm N BAP 90 grains sharp bullet vs. 5.7x28mm SS 109 bullet

It is quite ridiculous to compare the 5.7x28mm penetration capabilities with an old 9x19mm FMJ round. Other new calibers as 30 Super Carry and 7.92x24mm provide also impressive performances.  

.32 / 7.92mm BAP bullet - 12 inch penetration out a 3 inch barrel

Link to Dual Use concealed bulletproof vests

Dual Use 3A concealed body armor vests can use flexible 25x30cm enhanced inserts to stop armor piercing handgun ammunition as 5.7x28mm, 7.62x25mm Tokarev steel core, 9x19mm steel core, and other AP handgun ammunition.