Rifle · Proprietary
.22 Dasher
Precision varmint and PRS wildcat built on the 6mm BR case necked to .224 with a 40° shoulder.
- Caliber
- 0.224″ · 5.69 mm
- Introduced
- 2005
- Case
- Rimless
- Parent
- 6mm Dasher
- Status
- Active
- Introduced
- 2005
- Type
- Rifle
- Origin
- United States
- Inventor
- Al Ashton / Dan Dowling
- Standard
- Proprietary
- Status
- Active
- Availability
- Uncommon
- Primer
- Boxer Small Rifle
- Case type
- Rimless
- Eff. range
- 700 yd
Ballistics
Velocity only, no drag model: no published ballistic coefficient is on file for .22 Dasher, 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
- 6mm Dasher
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.
CIP TDCC · approximate| Measure | mm | in | ✓ |
|---|---|---|---|
| Bullet ⌀ | 5.69 | 0.224 | · |
| Neck ⌀ | 6.38 | 0.251 | ~ |
| Shoulder ⌀ | 11.58 | 0.456 | ~ |
| Shoulder angle | 40° | — | · |
| Base ⌀ | 11.91 | 0.469 | · |
| Rim ⌀ | 12.01 | 0.473 | · |
| Belt ⌀ | n/a | ||
| Rim thickness | 1.37 | 0.054 | · |
| Neck length | 6.25 | 0.246 | ≈ |
| Case length | 39.12 | 1.540 | · |
| Overall length | — | — | |
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. .22 Dasher is highlighted below.
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.
Lineage
Connected reference
History
Derived from the 6mm Dasher by necking down to .224 caliber, the .22 Dasher became popular in the PRS and NRL competition circuits for its exceptional accuracy and mild recoil. It is built on 6mmBR brass and offers near-.22-250 velocity with the case efficiency and accuracy of a benchrest-derived design.
FAQs
- What bullet diameter is .22 Dasher?
- .22 Dasher uses a 0.224″ (5.69 mm) diameter bullet.
- Is .22 Dasher still in production?
- .22 Dasher is active; typical availability is uncommon.
- What is .22 Dasher based on?
- .22 Dasher is derived from the 6mm Dasher (necked down) case.
Sources & provenance
- Manufacturer Sierra Bullets — Sierra Load Data — 6mm Dasher (parent case) archived
- Secondary AccurateShooter Daily Bulletin — 22 Dasher (article tag / coverage) · bullet ⌀, velocity 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 →