FBI HWFE

Handgun Wounding Factors and Effectiveness
Special Agent Urey W Patrick
Firearms Training Unit FBI Academeny
Quantico, Virginia
July 14, 1989

Re: how far can a bullet travel shot into water?

Re: how far can a bullet travel shot into water?: "Re: how far can a bullet travel shot into water?
Date: Thu Jul 12 13:06:51 2001
Posted By: Jaime Valencia-Rodríguez, Guest Researcher, Chemical Science and Technology Lab, NIST.
Area of science: Physics
ID: 991288529.Ph

Message:


Dear David:

Thank you for your question.
The problem you are addressing is an old one and it looks deceivingly
simple. We need to start mentioning Newton's Second Law. In the following
link there is a nice explanation about this subject:
ballistic trajectories

This page reads in part: 'In this lesson we will experiment with
computing and visualizing ballistic trajectories. A ballistic trajectory
is the path followed by an object which, after it is given some initial
velocity, travels only under the influence of gravity. For the purposes of
this lesson we will ignore the effects of air resistance.'

Well, ignoring air resistance, or, more generally, the medium resistance,
is a huge simplification. Nevertheless, we will go along for the moment.

The Ballistic Trajectory Problem
One of the first problems studied in an introductory physics class is the
ballistic trajectory problem. Let's assume that we are standing in a flat
field and that we throw a ball so that it starts out moving at some
velocity V > 0 and at some angle theta radians with the ground. At any
given time t, the ball's horizontal distance is given by

Vt cos (theta)

and its vertical height is given by

Vt sin(theta) - (1/2)gt^2

where g is the earth's gravitational constant, or 9.8 meters/sec/sec. This
assumes that the ball's initial ho"

Miscellaneous Questions

[See original article for a nice illustration and chart. Note that some of the information is factually incorrect. - SPG]

Miscellaneous Questions: "Q. How effective is the P90 'submachinegun' used on Stargate?
A. Despite all the manufacturer's hype and Hollywood glitz it is not as effective as they want you to believe. Weighing about 6.5 pounds with a loaded 50 rd magazine, it was originally designed as a 'personal defense weapon' for rear echelon troops and vehicle crew members that would be easier to to shoot effectively than a handgun.
The SS190 ball penetrates between 11 and 13.5 inches of gelatin, but the wound resulting from this projectile is a relatively small. The permanent cavity at its largest is either a .22 cal hole or simply a . 22 caliber flat slit the length of the projectile (2.1 cm) caused by the projectile tumbling. Although the 5.7 x 28 mm SS190 round penetrates soft body armor, its wound trauma incapacitation potential is at best like a .22 LR or .22 Magnum. Even 9mm NATO FMJ makes a larger wound--and I'm sure you know of the awe inspiring incapacitation potential of M882 FMJ 9 mm ball from the M9. While it's stated 'effective' range is listed as 200 meters this is pushing things a bit. While it can deliver a severe wound at that range, even up close it lacks the 'stopping' ability of most regular pistol rounds.

The 'civilian' 40 gr softpoint 5.7 mm rounds may be a bit more effective in creating a permanent cavity but penetration would be reduced. I haven't seen any tests of this round, but they too will reportedly penetrate some body armor.
The P90 is also available in a non-fully automatic civilian version with a 16' barrel as opposed to the 10' military version. The 16' barrel gives about 140 f/s greater velocity with the SS197 ammunition. Below is a table of currently available ammunition. Only the now discontinued SS196 and SS197 variants are available on the civilian market.
SS190SS191SS193 SubsonicSS195LFSS196SRS"

Wound ballistic simulation:

Wound ballistic simulation:
Assessment of the legitimacy of law enforcement firearms
ammunition by means of wound ballistic simulation
Jorma Jussila

Ballistic Technology - terminal ballistics testing media

Ballistic Technology

terminal ballistics: Information From Answers.com

terminal ballistics: Information From Answers.com: "sabot"

FN FiveseveN Forums - 5.7 vs. Ballistic Vest

Posted by WB880:

FN FiveseveN Forums - 5.7 vs. Ballistic Vest: "MODS FEEL FREE TO REMOVE THIS INFORMATION. PLEASE READ WHOLE POST.

I recently tested the ss195, ss196 and ss197 on a level IIIa vest that my department issues. For my test I slanted the test in favor (As in close range) to have the rounds penitrate the vest. I shot the vests from approximately 4ft (to approximate point blank range without risking my own injury too much), but not an any odd angles all shots were head on and into the center of the vest.

The vest was secured to clay blocks like it would fit on a body and the rounds were aimed at approximately center mass of the vest.

NONE of the above ammunition penitrated the vest from the FiveSeven Handgun. Here are a few pictures from my testing and recovered rounds from the test

Front of vest removed from carrier


Rear view of vest, note that the cloth sticker was stressed and buckled from the ss195, but the round DID NOT penitrate the vest.


Recovered rounds from the vest left to right ss196, ss197, ss195


As an LE Officer I feel confident that if I am shot with a FiveSeven pistol (I hope I never am shot though, already been shot at) with any of the above ammo I am 99% sure that my vest will stop the round.

I shot 2 vests both with the same results. One vest was purchased new approximately one year ago and was worn by an officer that quit 2 months after hire. The second vest was made in 1994, by the same company. Both vests performed exactly the same.

I hope this helps that the FiveSeven is no different than anyother gun out there when loaded with any commercially avaliable ammunition."

Tactical Forums: FN 5.7x28mm in gel

Tactical Forums: FN 5.7x28mm in gel:

Tactical Forums: FN Five Seven Test Data?

Tactical Forums: FN Five Seven Test Data?

Terminal Ballistics (Good article)

A good article on terminal ballistics

Terminal Ballistics

Tactical Forums: FN 5.7x28mm in gel

Tactical Forums: FN 5.7x28mm in gel

MEDICAL DEPARTMENT, UNITED STATES ARMY - WOUND BALLISTICS

Contents

MEDICAL DEPARTMENT, UNITED STATES ARMY
WOUND BALLISTICS
Prepared and published under the direction ofLieutenant General LEONARD D. HEATONThe Surgeon General, United States Army
Editor in Chief
Colonel JAMES BOYD COATES, Jr., MC
Editor for Wound Ballistics
Major JAMES C. BEYER, MC
OFFICE OF THE SURGEON GENERALDEPARTMENT OF THE ARMYWASHINGTON, D.C., 1962

Tactical Forums: Recomended Duty/Self-Defense Service Pistol Loads

Tactical Forums: Recomended Duty/Self-Defense Service Pistol Loads

Wound Ballistics Review - Journal of the International Wound Ballistics Association

Wound Ballistics Review - Journal of the International Wound Ballistics Association: "Wound Profile of the 5.7x28mm FN Cartridge (SS 190) Fired from the FN P90 Submachine Gun
Dean B. Dahlstrom, RCMP Forensic Laboratory, Regina, Saskatchewan, Canada
Kramer D. Powley, RCMP Forensic Laboratory, Regina, Saskatchewan, Canada
Cst. Gordon, Pope, Regina Police Service, Regina, Saskatchewan, Canada"

1911Forum - FN 5.7mm Stopping Power

1911Forum - FN 5.7mm Stopping Power

Tactical Forums: FN Five Seven Test Data?

Tactical Forums: FN Five Seven Test Data?

Tactical Forums: FN Five Seven Test Data?

Tactical Forums: FN Five Seven Test Data?

FN FiveseveN Forums - Terminal Ballistics of ss190 - Any documented incidents?

FN FiveseveN Forums - Terminal Ballistics of ss190 - Any documented incidents?

Tactical Forums: FN Five Seven Test Data?

Tactical Forums: FN Five Seven Test Data?

Wound ballistic simulation: