.270 Weatherby Magnum ballistic coefficient chart
G1 and G7 ballistic coefficients for 11 .270 Weatherby Magnum factory loads from 100 to 150 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Weatherby 100-grain Pointed-Expanding (H 270 100 SP) | 100 | 0.307 | - | 3,760 | - |
| Federal 130-grain Nosler Partition (P270WBA) | 130 | 0.416 | - | 3,200 | 1.135 |
| Federal 130-grain Sierra GameKing BTSP (P270WBB) | 130 | 0.459 | - | 3,200 | 1.130 |
| Federal 130gr. Trophy Bonded Tip (P270WBTT1) | 130 | 0.440 | - | 3,200 | - |
| Weatherby 130-grain Nosler Partition (N 270 130 PT) | 130 | 0.417 | - | 3,375 | 1.135 |
| Weatherby 130-grain Pointed-Expanding (H 270 130 SP) | 130 | 0.409 | - | 3,375 | - |
| Federal 140-grain Trophy Bonded Bear Claw (P270WBT1) | 140 | 0.378 | - | 3,100 | - |
| Weatherby 140-grain Barnes X-Bullet (B 270 140 XS) | 140 | 0.463 | - | 3,250 | - |
| Weatherby 140-grain Nosler Ballistic Tip (N 270 140 BST) | 140 | 0.456 | - | 3,300 | 1.296 |
| Weatherby 150-grain Nosler Partition (N 270 150 PT) | 150 | 0.466 | - | 3,245 | 1.250 |
| Weatherby 150-grain Pointed-Expanding (H 270 150 SP) | 150 | 0.462 | - | 3,245 | - |
Using these numbers
A ballistic coefficient describes how well a bullet keeps its speed against air resistance, compared with a standard reference projectile. G7 figures suit long, boat-tailed match and hunting bullets and stay more consistent across velocities; G1 figures are larger numbers for the same bullet and are what most manufacturers have published historically. Use whichever your calculator asks for, but never mix a G1 number with the G7 drag model.
Every load here is in the ballistic calculator's bullet library — search for it to build a range card in one step, then true the velocity against your own chronograph.