Rimfire · SAAMI
.21 Sharp
Modern Winchester rimfire using a smaller-diameter, non-heeled bullet in a .22 LR-compatible case envelope..
- Caliber
- 0.2105″ · 5.347 mm
- Introduced
- 2024
- Case
- Rimfire
- Parent
- .22 Long Rifle
- Primary use
- Target, Small game
- Status
- Active
- Introduced
- 2024
- Type
- Rimfire
- Origin
- United States
- Inventor
- Winchester Ammunition
- Manufacturer
- Winchester Ammunition
- Standard
- SAAMI
- Status
- Active
- Availability
- Limited
- Twist (typical)
- 1:12
- Primer
- Rimfire
- Case type
- Rimfire
- Max pressure
- 24,000 psi
- Eff. range
- 125 yd
Introduced by Winchester Ammunition
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .21 Sharp, 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
- .22 Long Rifle
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 · verified| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 5.35 | 0.211 | ✓ |
| Neck ⌀ | 5.74 | 0.226 | ✓ |
| Shoulder ⌀ | n/a | ||
| Shoulder angle | n/a | ||
| Base ⌀ | 5.74 | 0.226 | ✓ |
| Rim ⌀ | 7.06 | 0.278 | ✓ |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.09 | 0.043 | ✓ |
| Neck length | n/a | ||
| Case length | 15.57 | 0.613 | ✓ |
| Overall length | 24.51 | 0.965 | ✓ |
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. .21 Sharp is highlighted below.
Lineage
Connected reference
History
Introduced by Winchester 2024 (SAAMI drawing 2023). SAAMI COAL is a range, 0.965–1.000".
FAQs
- What twist rate does .21 Sharp use?
- .21 Sharp typically uses a 1:12 twist rate.
- What bullet diameter is .21 Sharp?
- .21 Sharp uses a 0.2105″ (5.347 mm) diameter bullet.
- Is .21 Sharp still in production?
- .21 Sharp is active; typical availability is limited.
- What is .21 Sharp used for?
- .21 Sharp is primarily used for target, small game.
- What is .21 Sharp based on?
- .21 Sharp is derived from the .22 Long Rifle case.
Sources & provenance
Data & sources. Specs compiled from the Lindcott Armory reference; the trajectory is modeled (point-mass), not measured. See methodology. Spotted an error? Report it →