Shotgun · Proprietary
12/14 Gauge Greener Police
W.W.
- Caliber
- 0.73″ · 18.542 mm
- Introduced
- 1921
- Case
- Rimless
- Primary use
- military
- Status
- Discontinued
- Introduced
- 1921
- Type
- Shotgun
- Origin
- United Kingdom
- Inventor
- W.W. Greener
- Manufacturer
- W.W. Greener
- Standard
- Proprietary
- Status
- Discontinued
- Availability
- Collector
- Twist (typical)
- N/A (smoothbore)
- Primer
- 209 Shotshell
- Case type
- Rimless
- Max pressure
- 25,000 psi
- Eff. range
- 50 yd
- Recoil
- 8–14 ft·lb
- Subsonic
- Capable
Ballistics
Published velocity/energy data isn't available for 12/14 Gauge Greener Police — 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.
mixed/other · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 18.54 | 0.730 | ~ |
| Neck ⌀ | 18.80 | 0.740 | · |
| Shoulder ⌀ | 19.86 | 0.782 | ~ |
| Shoulder angle | — | — | |
| Base ⌀ | 19.86 | 0.782 | · |
| Rim ⌀ | 21.49 | 0.846 | ~ |
| Belt ⌀ | n/a | ||
| Rim thickness | — | — | |
| Neck length | — | — | |
| Case length | 73.03 | 2.875 | ~ |
| Overall length | 73.03 | 2.875 | ~ |
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. 12/14 Gauge Greener Police is highlighted below.
Missing a dimension for 12/14 Gauge Greener Police? Some case measurements aren't in a published SAAMI/CIP drawing yet. Have a factory or reamer print? Send it → — verified hard-to-find data earns a free Lindcott sticker.
Factory loads
Being verified
Advertised FPS, energy, and BC are withheld until loads clear verification.
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.
Connected reference
History
W.W. Greener's specialized shotgun/rifle cartridge for a unique police weapon he designed. The 12/14 gauge designation means the chamber accepts a 12 gauge shell but fires through a 14 gauge bore constriction, making the weapon incompatible with standard 12 gauge ammunition to prevent theft or misuse by criminals.
FAQs
- What twist rate does 12/14 Gauge Greener Police use?
- 12/14 Gauge Greener Police typically uses a N/A (smoothbore) twist rate.
- What bullet diameter is 12/14 Gauge Greener Police?
- 12/14 Gauge Greener Police uses a 0.73″ (18.542 mm) diameter bullet.
- Is 12/14 Gauge Greener Police still in production?
- 12/14 Gauge Greener Police is discontinued; typical availability is collector.
- What is 12/14 Gauge Greener Police used for?
- 12/14 Gauge Greener Police is primarily used for military.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 1 live factory loads; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →