Rimfire · Not SAAMI standardized · Not standardizedObsolete
.25 Stevens Long
Early 20th century rimfire from Stevens Arms.
- Caliber
- 0.251″ · 6.375 mm
- Introduced
- 1898
- Case
- Rimfire
- Primary use
- Varminting
- Status
- Discontinued
- Obsolete
- Obsolete
- Introduced
- 1898
- Type
- Rimfire
- Origin
- United States
- Inventor
- Stevens Arms
- Manufacturer
- Stevens Arms
- Standard
- Not SAAMI standardized · Not standardized
- SAAMI
- Not SAAMI standardized
- Obsolete
- Obsolete
- Status
- Discontinued
- Availability
- Collector
- Case capacity
- 13 gr H₂O
- Twist (typical)
- 1:14
- Primer
- Rimfire
- Case type
- Rimfire
- Max pressure
- 16,000 CUP, SAAMI crusher
- Eff. range
- 100 yd
- Max range
- 2600 yd
- Recoil
- 0.3–0.8 ft·lb
- Subsonic
- Capable
Introduced by Stevens Arms
Ballistics
Published velocity/energy data isn't available for .25 Stevens Long — an obsolete/collector cartridge.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
Wikipedia · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 6.38 | 0.251 | ✓ |
| Neck ⌀ | 7.01 | 0.276 | ✓ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 7.01 | 0.276 | ✓ |
| Rim ⌀ | 8.46 | 0.333 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.31 | 0.052 | |
| Neck length | n/a | ||
| Case length | 28.58 | 1.125 | ✓ |
| Overall length | 35.43 | 1.395 | ✓ |
Size vs familiar rounds
Drawn at true 1:1 — every case is accurate relative to the others. Absolute size depends on your screen's pixel density, so measuring one against a real ruler may be off. .25 Stevens Long is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
History
Developed by Stevens Arms in the late 19th century as a gallery and small-game cartridge for single-shot rifles. One of several .25 Stevens variants produced for the target and sporting market. Discontinued as rimfire technology consolidated around .22 LR.
FAQs
- What twist rate does .25 Stevens Long use?
- .25 Stevens Long typically uses a 1:14 twist rate.
- What bullet diameter is .25 Stevens Long?
- .25 Stevens Long uses a 0.251″ (6.375 mm) diameter bullet.
- Is .25 Stevens Long still in production?
- .25 Stevens Long is discontinued; typical availability is collector.
- What is .25 Stevens Long used for?
- .25 Stevens Long is primarily used for varminting.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 20 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
