| .204 Ruger |
|---|
| Type | Rifle |
|---|
| Place of origin | United States |
|---|
|
| Designer | Ruger/Hornady |
|---|
| Designed | 2004 |
|---|
| Produced | 2004–present |
|---|
|
| Parent case | .222 Remington Magnum |
|---|
| Case type | Rimless, bottleneck |
|---|
| Bullet diameter | .204 in (5.2 mm) |
|---|
| Neck diameter | .2311 in (5.87 mm) |
|---|
| Shoulder diameter | .3598 in (9.14 mm) |
|---|
| Base diameter | .3764 in (9.56 mm) |
|---|
| Rim diameter | .378 in (9.6 mm) |
|---|
| Rim thickness | .0449 in (1.14 mm) |
|---|
| Case length | 1.850 in (47.0 mm) |
|---|
| Overall length | 2.2598 in (57.40 mm) |
|---|
| Rifling twist | 1-12 |
|---|
| Primer type | Small rifle |
|---|
|
|
|
| Bullet mass/type |
Velocity |
Energy |
| 32 gr. (2.1 g) BT |
4,225 ft/s (1,288 m/s) |
1,268 ft⋅lbf (1,719 J) |
| 40 gr. (2.6 g) BT |
3,900 ft/s (1,200 m/s) |
1,351 ft⋅lbf (1,832 J) |
| 45 gr. (2.9 g) SP |
3,625 ft/s (1,105 m/s) |
1,313 ft⋅lbf (1,780 J) |
| 40 gr. (2.6 g) Hornady V-Max, Norma |
3,806 ft/s (1,160 m/s) |
1,195 ft⋅lbf (1,620 J) |
| 24 gr. (1.55 g) Hornady Super Performance varmint ammunition |
4,400 ft/s (1,341 m/s) |
1,032 ft⋅lbf (1,399 J) |
|
| Source(s): Hornady
Norma |
The .204 Ruger / 5.2x47mm is a centerfire rifle cartridge developed by Hornady and Ruger. At the time of its introduction in 2004, the .204 Ruger was the second-highest velocity commercially produced ammunition and the only centerfire cartridge produced commercially for bullets of .204 inch/5 mm caliber.