117.0 gr. Sierra SPT Pro-Hunter (1640) - .257
| Manufacturer | Sierra |
|---|---|
| Model | SPT Pro-Hunter |
| Model Number | 1640 |
| Caliber | .257 |
| Weight | 117.0 gr. |
| Sectional Density | 0.253 |
117.0 gr. Sierra SPT Pro-Hunter (1640) - .257
Drag Profiles
| Data Source | Drag Function | BC | Form Factor |
|---|---|---|---|
| Sierra | G1 |
0.362 below 1,800 fps 0.383 between 1,800 fps and 2,500 fps 0.388 above 2,500 fps |
|
| Applied Ballistics | G7 | 0.180 | 1.406 |
| Applied Ballistics | G1 | 0.351 | 0.721 |
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