Rimfire · Proprietary
4mm Flobert
Miniature European parlor/training cartridge; the smallest commercially produced Flobert cartridge, used in indoor gallery pistols and training arms..
- Caliber
- 0.1772″ · 4.5 mm
- Introduced
- 1880
- Case
- Rimmed
- Primary use
- Target, Small game
- Status
- Active
- Introduced
- 1880
- Type
- Rimfire
- Origin
- Germany
- Inventor
- Louis-Nicolas Flobert
- Manufacturer
- Louis-Nicolas Flobert
- Standard
- Proprietary
- Status
- Active
- Availability
- Rare
- Case capacity
- 1.3 gr H₂O
- Twist (typical)
- 1:9
- Primer
- Rimfire
- Case type
- Rimmed
- Max pressure
- 20,300 psi, CIP transducer
- Eff. range
- 25 yd
- Max range
- 1100 yd
- Recoil
- 0.01 ft·lb
- Subsonic
- Capable
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for 4mm Flobert, so this is the shape gravity alone gives the advertised velocity. Drag would steepen it. The tool below solves real loads through their published G1 or G7 model.
Open in Ballistic Compare- Parent case
- —
Representative trajectory — modeled from a single velocity input (no published BC for this cartridge yet).
Dimensionscase measurements · scale drawing · size vs familiar rounds
Case dimensions — the scale drawing at the top of the page is built from these.
SAAMI · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 4.50 | 0.177 | · |
| Neck ⌀ | 4.60 | 0.181 | ~ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 4.60 | 0.181 | · |
| Rim ⌀ | 5.90 | 0.232 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.00 | 0.039 | · |
| Neck length | n/a | ||
| Case length | 8.20 | 0.323 | · |
| Overall length | 10.80 | 0.425 | · |
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. 4mm Flobert is highlighted below.
Connected reference
History
The 4mm Flobert is the smallest commercially produced Flobert cartridge, used in European salon pistols and training arms. Like all Flobert cartridges it uses only the primer compound as propellant. Still produced in limited quantities by European makers for collector arms and indoor gallery use.
FAQs
- What twist rate does 4mm Flobert use?
- 4mm Flobert typically uses a 1:9 twist rate.
- What bullet diameter is 4mm Flobert?
- 4mm Flobert uses a 0.1772″ (4.5 mm) diameter bullet.
- Is 4mm Flobert still in production?
- 4mm Flobert is active; typical availability is rare.
- What is 4mm Flobert used for?
- 4mm Flobert is primarily used for target, small game.
Sources & provenance
- Manufacturer Sellier & Bellot — 4 mm Randz Court (rimfire ammunition product/datasheet) · velocity, grain weights, bullet ⌀ archived
- Secondary Wikipedia (pointer) — 4 mm Flobert Short · grain weights, bullet ⌀, velocity archived
- Secondary Municion.org — 4 mm Flobert Short case archived
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →
