| .38 Long rimfire |
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|
| Type | Rifle and handgun |
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| Place of origin | United States |
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|
| Used by | US Army |
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|
| Variants | Short, Long, and Extra Long |
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|
| Case type | Rimmed, straight |
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| Bullet diameter | .374 in (9.5 mm) |
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| Neck diameter | .376 in (9.6 mm) |
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| Shoulder diameter | .376 in (9.6 mm) |
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| Base diameter | .378 in (9.6 mm) |
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| Rim diameter | .433 in (11.0 mm) |
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| Rim thickness | .051 in (1.3 mm) |
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| Case length | 0.874 in (22.2 mm) |
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| Overall length | 1.382 in (35.1 mm) |
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| Primer type | Rimfire |
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| Maximum pressure (CIP) | 13,000 psi (90 MPa) |
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|
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|
| Bullet mass/type |
Velocity |
Energy |
| 150 gr (10 g) LRN |
980 ft/s (300 m/s) |
320 ft⋅lbf (430 J) |
|
| Test barrel length: Rifle |
| .38 Extra Long rimfire |
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| Type | Rifle and handgun |
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| Place of origin | United States |
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|
| Case type | Rimmed, straight |
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| Bullet diameter | .374 in (9.5 mm) |
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| Neck diameter | .376 in (9.6 mm) |
|---|
| Shoulder diameter | .376 in (9.6 mm) |
|---|
| Base diameter | .378 in (9.6 mm) |
|---|
| Rim diameter | .433 in (11.0 mm) |
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| Rim thickness | .051 in (1.3 mm) |
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| Case length | 1.48 in (38 mm) |
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| Overall length | 2.025 in (51.4 mm) |
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| Primer type | Rimfire |
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|
|
|
| Bullet mass/type |
Velocity |
Energy |
| 150 gr (10 g) LRN |
1,250 ft/s (380 m/s) |
520 ft⋅lbf (710 J) |
|
| Test barrel length: Rifle |
The .38 rimfire / 9.5x22mmRF refers to a family of cartridges that have been in service in the United States since the mid-19th century. The cartridges are produced in short, long, and extra long variants.
Much like the smaller .32 rimfire, the rounds were originally manufactured loaded with black powder. In the early 1900s, manufacturers switched to the "new" smokeless powder.
The .38 rimfire was preferred to the .32 rimfire for hunting and self-defense purposes because of its larger diameter bullet and increased muzzle energy.
