4 mm caliber
This is a list of firearm cartridges which have bullets in the to caliber range.
All measurements are in mm.
Rimfire cartridges
| Name | Bullet | Case length | Rim | Base | Shoulder | Neck | Overall length |
| .17 Mach 2 | 4.368 | 18.14 | 6.99 | 5.74 | 5.74 | 4.57 | 25.4 |
| .17 HMR | 4.368 | 26.87 | 6.99 | 5.74 | 5.74 | 4.57 | 34.26 |
| .17 PMC/Aguila | 4.4 | 15.0 | 6.9 | - | - | - | 25 |
| .17 Munisalva | 4.5 | 6.3 | 6.8 | - | - | - | 10.8 |
| .17 Winchester Super Magnum | 4.382 | 30.48 | 8.46 | 6.83 | 6.833 | 5.004 | 40.39 |
| 4.5×26mm MKR | 4.5 | - | - | - | - | - | - |
Centerfire cartridges
Pistol and PDW cartridges
Revolver cartridges
Rifle cartridges
| Name | Bullet | Case type | Case length | Rim | Base | Shoulder | Neck | Overall length |
| .17 Hornet | 4.368 | 35.6 | 8.9 | 7.6 | 7.3 | 4.9 | 43.69 | |
| .17 Mach IV | 4.368 | 35.6 | 9.6 | 9.6 | 9.2 | 5.2 | - | |
| .17 Remington | 4.368 | 45.62 | 9.601 | 9.550 | 9.042 | 5.055 | 55.118 | |
| .17 Remington Fireball | 4.368 | 36.07 | 9.60 | 9.57 | 9.33 | 5.23 | 46.48 | |
| .17 Ackley Bee | 4.4 | 34 | 10.4 | 8.9 | 8.5 | 5.0 | - | |
| 4.6×36mm | 4.65 | 35.61 | 8.94 | 8.94 | 8.48 | 5.27 | 49.16 | |
| 4.32×45mm SBR | - | - | - | - | - | - | - | |
| 4.85×49mm | 5.0 | Rimless bottlenecked | 48.9 | 9.6 | 9.5 | 9.0 | 5.6 | 62.4 |