Rifle · SAAMI
.30-40 Krag
America's first smokeless powder military rifle cartridge.
- Caliber
- 0.308″ · 7.823 mm
- Introduced
- 1892
- Case
- Rimmed
- Primary use
- Military (Historical), Hunting
- Status
- Active
- Introduced
- 1892
- Type
- Rifle
- Origin
- United States
- Inventor
- U.S. Army
- Manufacturer
- U.S. Military
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Case capacity
- 55 gr H₂O
- Twist (typical)
- 1:10
- Primer
- Large Rifle
- Case type
- Rimmed
- Max pressure
- 40,000 psi
- Eff. range
- 500 yd
- Max range
- 1500 yd
- Recoil
- 12–16 ft·lb
- Subsonic
- Capable
Ballistics
Published velocity/energy data isn't available for .30-40 Krag.
Performance
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
CIP TDCC · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 7.82 | 0.308 | ✓ |
| Neck ⌀ | 8.59 | 0.338 | ✓ |
| Shoulder ⌀ | 10.74 | 0.423 | ~ |
| Shoulder angle | 21.1° | — | ✓ |
| Base ⌀ | 11.61 | 0.457 | ~ |
| Rim ⌀ | 13.84 | 0.545 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.63 | 0.064 | ✓ |
| Neck length | 12.33 | 0.485 | ≈ |
| Case length | 58.78 | 2.314 | ✓ |
| Overall length | 78.46 | 3.089 | ✓ |
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. .30-40 Krag is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
6 reloading powders listed for .30-40 Krag, fastest to slowest. Cross-reference in the finder →
Reloading costestimate cost per round vs factory
Estimate your cost per round and how it compares to factory. Inputs are yours — nothing is stored.
Cost estimate only — not load data. Charge weight is your input; follow published manuals for safe charges.
Firearms chambered in .30-40 Krag
12 models in the database chamber .30-40 Krag. Browse all →
Connected reference
History
Adopted in 1892 for the Krag-Jorgensen rifle — America's first bolt action military rifle. Saw action in the Spanish-American War and Philippine Insurrection. Replaced by .30-06 Springfield in 1906 after Theodore Roosevelt's forces were outshot by Spanish Mausers.
FAQs
- What twist rate does .30-40 Krag use?
- .30-40 Krag typically uses a 1:10 twist rate.
- What bullet diameter is .30-40 Krag?
- .30-40 Krag uses a 0.308″ (7.823 mm) diameter bullet.
- Is .30-40 Krag still in production?
- .30-40 Krag is active; typical availability is common.
- What is .30-40 Krag used for?
- .30-40 Krag is primarily used for military (historical), hunting.
- What are the best powders for .30-40 Krag?
- Reloading powders commonly listed for .30-40 Krag include IMR 3031, IMR 4895, N135, H4895, among 6 suitable options.
Sources & provenance
- Standard SAAMI — ANSI/SAAMI Z299 — Cartridge & Chamber Drawings archived
- Standard C.I.P. — C.I.P. TDCC — Tables of Dimensions of Cartridges and Chambers
- Standard SAAMI — ANSI/SAAMI Z299.4-2025 — Centerfire Rifle Velocity & Pressure Data · grain_ballistics, representative_gun archived
- Manufacturer Remington — Core-Lokt 30-40 Krag 180 Grain Pointed Soft Point (SKU 28345) · grain_ballistics, representative_gun archived
- Manufacturer HSM Ammunition — HSM Game King line — 30-40 Krag 150gr Sierra GameKing SBT · grain_ballistics, representative_gun archived
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 35 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →