Shotgun · SAAMI
.410 Bore
The smallest production shotshell.
- Caliber
- 0.41″ · 10.414 mm
- Introduced
- 1874
- Case
- Rimmed
- Primary use
- Small Game, Pest Control, Youth
- Status
- Active
- Introduced
- 1874
- Type
- Shotgun
- Origin
- United Kingdom
- Inventor
- Various
- Manufacturer
- Various
- Standard
- SAAMI
- Status
- Active
- Availability
- Common
- Twist (typical)
- N/A (smoothbore)
- Primer
- 209 Shotshell
- Case type
- Rimmed
- Max pressure
- 13,500 psi
- Eff. range
- 25 yd
- Max range
- 100 yd
- Recoil
- 8–12 ft·lb
- Subsonic
- Capable
Ballistics
Published velocity/energy data isn't available for .410 Bore.
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 ⌀ | 10.41 | 0.410 | ✓ |
| Neck ⌀ | 11.56 | 0.455 | ~ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 11.94 | 0.470 | ✓ |
| Rim ⌀ | 13.60 | 0.536 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.52 | 0.060 | ~ |
| Neck length | n/a | ||
| Case length | 63.50 | 2.500 | ✓ |
| Overall length | 50.80 | 2.000 | ~ |
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. .410 Bore is highlighted below.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
Suitable powders
5 reloading powders listed for .410 Bore, 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 .410 Bore
12 models in the database chamber .410 Bore. Browse all →
Connected reference
History
The smallest practical shotshell, used for small game, pest control, and introducing youth to shotguns. Also chambered in revolvers (Taurus Judge, S&W Governor). Limited but dedicated market.
FAQs
- What twist rate does .410 Bore use?
- .410 Bore typically uses a N/A (smoothbore) twist rate.
- What bullet diameter is .410 Bore?
- .410 Bore uses a 0.41″ (10.414 mm) diameter bullet.
- Is .410 Bore still in production?
- .410 Bore is active; typical availability is common.
- What is .410 Bore used for?
- .410 Bore is primarily used for small game, pest control, youth.
- What are the best powders for .410 Bore?
- Reloading powders commonly listed for .410 Bore include Red Dot, International Clays, Green Dot, Winchester 296, among 5 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
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 213 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →