Lindcott Armory Pistol · Not SAAMI standardized
9x25 Dillon
Mike Dillon's competition pistol cartridge created by necking down 10mm Auto to 9mm.
- Introduced
- 1989
- Type
- Pistol
- Origin
- United States
- Inventor
- Mike Dillon
- Manufacturer
- Dillon Precision
- Standard
- Not SAAMI standardized
- Status
- Discontinued
- Availability
- Collector
- Bullet ⌀
- 0.356″
- Case length
- 0.99″
- Overall length
- 1.25″
- Base ⌀
- 0.425″
- Rim ⌀
- 0.425″
- Case capacity
- 15.5 gr H₂O
- Twist
- 1:10
- Primer
- Boxer Small Pistol
- Case type
- Rimless
- Max pressure
- 37,500 psi
- Eff. range
- 100 yd
- Recoil
- 3.5–5.5 ft·lb
- Subsonic
- Capable
Ballistics
- Velocity
- 1,400–1,600 fps
- Energy
- 500–653 ft·lb
- By real loads
- 1,400–2,060 fps · 18 loads
- Typical MSRP
- $0.85/rd · price history →
- Parent case
- —
Representative trajectory — modeled from a single velocity input, not a measured load. Real published loads span the "by real loads" range above.
Factory loads
In production — 18 active loads across 12 brands. Top 15 shown · see all 20 →.
| Brand | Load | Grain | Bullet | FPS | ft·lb | BC | $/rd |
|---|---|---|---|---|---|---|---|
| Underwood | Competition | 90 | JHP | 2,060 | 848 | — | $2.00 |
| DoubleTap | JHP | 100 | JHP | 1,750 | 680 | — | $0.85 |
| Cor-Bon | JHP Competition | 100 | JHP | 1,750 | 680 | — | $1.60 |
| Underwood | JHP +P | 100 | JHP | 1,750 | 680 | — | $2.00 |
| Doubletap | DT Defense | 90 | Jacketed Hollow Point | 1,700 | 577 | — | — |
| HSM Ammunition | Self Defense | 90 | Jacketed Hollow Point | 1,700 | 577 | — | — |
| Armscor | Standard | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $0.06 |
| Cor-Bon | DPX | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $2.00 |
| Buffalo Bore | Heavy | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $0.85 |
| Black Hills | Match | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $3.50 |
| Wolf | FMJ | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $0.35 |
| Sellier & Bellot | JHP | 90 | Jacketed Hollow Point | 1,700 | 577 | — | $0.85 |
| DoubleTap | Defense | 88 | JHP | 1,600 | 500 | — | $0.85 |
| Cor-Bon | FMJ Training | 124 | FMJ | 1,600 | 705 | — | $1.60 |
| Buffalo Bore | Heavy | 115 | BJHP | 1,450 | 537 | — | $0.85 |
Velocities are manufacturer-stated (test-barrel). Discontinued loads dimmed.
Dimensions
Reloading cost
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
Developed by champion shooter Mike Dillon in 1989 for IPSC Open Division competition. The cartridge necks down 10mm Auto brass to accept 9mm bullets, producing extraordinary velocities around 1,600 fps. Creates major power factor in Open pistols using minimal compensator-friendly case volume. Never commercially produced; hand-formed brass only.
FAQs
- What twist rate does 9x25 Dillon use?
- 9x25 Dillon typically uses a 1:10 twist rate.
- What bullet diameter is 9x25 Dillon?
- 9x25 Dillon uses a 0.356″ (9.042 mm) diameter bullet.
- Is 9x25 Dillon still in production?
- 9x25 Dillon is discontinued; typical availability is collector.
- What is 9x25 Dillon used for?
- 9x25 Dillon is primarily used for self-defense.
Data & sources. Specs compiled from the Lindcott Armory reference; availability counted from 18 live factory loads; the trajectory is modeled (point-mass), not measured. Spotted an error? Report it →