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Gunthorp Ammo Specs

Stopping Power

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ammo basics  -  ammo specifications ammo pricing

Stopping Power - Energy Table - Ballistics

 

Energy relates to how much stored up work can be done and is based upon the mass of the projectile divided by two and its velocity squared.  Momentum relates to the duration and force required to start or to stop an object and is based upon mass and simple velocity.  Ammunition manufacturers use energy to describe the power of a cartridge.  US Army field studies slaughtering cattle indicate that power may be more closely related to momentum.  The answer may lie somewhere in the middle.  The concept of stopping power adds more complexity, because target anatomy and shot placement may be more important than anything else.  Firepower can be demonstrated by a .50 cal machine gun burst, but unless the target is hit, a well placed .22 would have more stopping power.   In a gunfight, the successful outcome depends most upon the mindset developed by positive attitude and preparation, and skill from practicing with reliable equipment.

 

  This table of stopping power uses a formula favoring momentum over energy.

The formula multiplies the bulletís base area in square inches times its weight in grains times its velocity in feet per second, then divides by an arbitrary number (1000) to get a result which can be compared easily.

 

Caliber     Bore Diameter      Base   Weight  Velocity       Power

 

500 S&W                   .500    .1963    400      1800         141.37

454 Casull                  .451    .1598    300      1630           78.14

44 Magnum                 .429    .1445    240      1400           48.55

41 Magnum                 .410    .1320    250      1250           41.25

 

45 ACP                      .451    .1598    230        850           31.24

40 Smith & Wesson   .401    .1263    180        990           22.51

357 Magnum              .357    .1001    158      1240           19.61

 

9mm Luger                 .355    .0990    124      1120           13.75

38 Special                  .357    .1001    158       760           12.02

380 Auto                    .355    .0990      95      1000            9.41

 

32 Auto                      .308    .0745      65        950            4.60

25 Auto                      .250    .0491      50        800            1.96

22 Long Rifle             .220    .0380      40        900            1.37

Handgun wounding factors and effectiveness

http://www.firearmstactical.com/pdf/fbi_10mm_notes.pdf

Terminal ballistics seen in the morgue

   Energy Table

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ammo basics  -  ammo specifications  -  ammo pricing

Stopping Power - Energy Table - Ballistics

 

You can calculate the energy of any bullet by multiplying its weight in grains by the velocity factor below.

 

Velocity  00      20      40     60      80                 Velocity  00      20      40     60      80

 

  500       .55     .60     .65     .70    .75                2000     8.88   9.06   9.25   9.42  9.60

   600       .80     .85     .91     .96   1.02               2100     9.80   9.98 10.17 10.36 10.55

  700     1.08   1.15   1.21   1.28  1.34                2200  10.74 10.94 11.14 11.34 11.54

  800     1.42   1.49   1.56   1.64  1.72                2300  11.74 11.95 12.16 12.37 12.58

  900     1.79   1.87   1.96   2.04  2.13                2400  12.78 13.00 13.22 13.44 13.66

 

1000     2.22   2.31   2.40   2.49  2.59                2500  13.88 14.10 14.32 14.55 14.78

1100     2.68   2.78   2.88   2.99  3.09                2600  15.01 15.24 15.48 15.71 15.96

1200     3.19   3.30   3.41   3.52  3.63                2700  16.19 16.43 16.67 16.91 17.16

1300     3.75   3.86   3.98   4.10  4.22                2800  17.41 17.66 17.91 18.16 18.42

1400     4.35   4.47   4.60   4.73  4.86                2900  18.67 18.93 19.19 19.45 19.72

 

1500     5.00   5.13   5.26   5.40  5.54                3000  19.98 20.25 20.52 20.79 21.06

1600     5.68   5.82   5.97   6.12  6.26                3100  21.33 21.61 21.39 22.17 22.45

1700     6.41   6.57   6.72   6.88  7.03                3200  22.73 23.02 23.30 23.59 23.88

1800     7.19   7.35   7.51   7.68  7.84                3300  24.18 24.47 24.77 25.06 25.36

1900     8.01   8.18   8.35   8.53  8.70                3400  25.66 25.97 26.27 26.58 26.89

 

Federal Ballistics

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Stopping Power - Energy Table - Ballistics

 

Federal ammunition ballistics:

Load Details

 

Load No.

 

Caliber

Primer No.

Bullet Weight
Grains / Grams

Bullet style

 

AE380AP

 

380 Auto (9x17mm Short)

100

95 / 6.15

FMJ

P40HS1

 

40 S&W

100

180 / 11.66

Hydra-Shok 

AE40R1

 

40 S&W

200

180 / 11.66

FMJ

P45HS1

 

45 Auto

150

230 / 14.9

Hydra-Shok 

AE45A

 

45 Auto

150

230 / 14.9

FMJ

P9HS2

 

9mm Luger (9x19mm)

200

147 / 9.52

Hydra-Shok 

AE9FP

 

9mm Luger (9x19mm)

200

147 / 9.52

FMJ FN

P38HS1

+P 

38 Special

100

129 / 8.36

Hydra-Shok 

PD380HS1 H

 

380 Auto (9x17mm Short)

100

90 / 5.83

Hydra-Shok 

P357HS1

 

357 Magnum

100

158 / 10.23

Hydra-Shok 

AE357A

 

357 Magnum

100

158 / 10.23

JSP

AE38K

 

38 Special

100

130 / 8.43

FMJ

 

Velocity in Feet Per Second (To Nearest 10 FPS)

Load No.

Muzzle

25 Yds

50   Yds

75 Yds

100 Yds

 

AE380AP

960

910

870

830

790

 

P40HS1

990

960

930

910

890

 

AE40R1

990

960

940

910

890

 

P45HS1

850

830

810

790

770

 

AE45A

850

830

810

790

770

 

P9HS2

1000

960

920

890

860

 

AE9FP

960

930

910

890

870

 

P38HS1

950

930

910

890

870

 

PD380HS1 H

1000

940

890

840

800

 

P357HS1

1240

1160

1100

1060

1020

 

AE357A

1240

1160

1100

1060

1020

 

AE38K

950

920

890

870

840

 

 

Energy in Foot Pounds (To Nearest 5 Foot-Pounds)

Load No.

Muzzle

25 Yds

50 Yds

75 Yds

100 Yds

Test Barrel Length Inches

AE380AP

190   

175

160

145

130

3 3/4

P40HS1

390

365

345

330

315

4

AE40R1

390

370

350

330

315

4

P45HS1

370

350

335

320

305

5

AE45A

370

350

335

320

305

5

P9HS2

325

300

275

260

240

4

AE9FP

295

280

270

260

250

4

P38HS1

255

245

235

225

215

4-V

PD380HS1 H

200

175

160

140

130

3 3/4

P357HS1

535

475

430

395

365

4-V

AE357A

535

475

430

395

365

4-V

AE38K

260

245

230

215

205

4-V

 

Mid-Range Trajectory

Load No.

25 Yds

50 Yds

75 Yds

100 Yds

AE380AP

0.3

1.3

3.1

5.8

P40HS1

0.3

1.2

2.8

5

AE40R1

0.3

1.2

2.7

5

P45HS1

0.4

1.6

3.6

6.6

AE45A

0.4

1.6

3.6

6.6

P9HS2

0.3

1.2

2.8

5.1

AE9FP

0.3

1.3

2.9

5.3

P38HS1

0.3

1.3

2.9

5.3

PD380HS1 H

0.3

1.2

2.9

5.5

P357HS1

0.2

0.8

1.9

3.5

AE357A

0.2

0.8

1

3.5

AE38K

0.3

1.3

3

5.5

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ammo basics  -  ammo specifications  -  ammo pricing

Stopping Power - Energy Table - Ballistics

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