.25-06 Roberts ballistic coefficient chart
G1 and G7 ballistic coefficients for 16 .25-06 Roberts factory loads from 85 to 120 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Winchester 85-grain Ballistic Silvertip (SBST2506A) | 85 | 0.334 | - | 3,470 | - |
| Federal 90-grain Sierra Varminteer HP (P2506V) | 90 | 0.260 | - | 3,440 | - |
| Winchester 90-grain Positive Expanding Point (X25061) | 90 | 0.260 | - | 3,440 | - |
| Federal 100-grain Barnes XLC Coated X-Bulllet (P2506F) | 100 | 0.421 | - | 3,210 | - |
| Remington 100-grain Pointed Soft Point Core-Lokt (R25062) | 100 | 0.293 | - | 3,230 | - |
| Federal 115-grain Nosler Ballistic Tip (P2506D) | 115 | 0.393 | - | 3,210 | 1.207 |
| Federal 115gr. Nosler Partition (P2506E) | 115 | 0.389 | - | 3,030 | 1.145 |
| Winchester 115-grain Ballistic Silvertip (SBST2506) | 115 | 0.410 | - | 3,060 | 1.207 |
| Federal 117-grain Sierra GameKing BTSP (P2506C) | 117 | 0.437 | - | 2,990 | 1.116 |
| Federal 117-grain Sierra Pro-Hunter SP (2506BS) | 117 | 0.364 | - | 2,990 | - |
| Hornady 117-grain BTSP (8145) | 117 | 0.391 | - | 2,990 | 1.138 |
| Hornady 117-grain BTSP-Light Magnum (8545) | 117 | 0.382 | - | 3,110 | 1.138 |
| PMC 117-grain Pointed Soft Point (25-06B) | 117 | 0.384 | - | 2,950 | - |
| Remington 120-grain Pointed Soft Point Core-Lokt (R25063) | 120 | 0.363 | - | 2,990 | - |
| Speer 120-grain Grand Slam (24514) | 120 | 0.329 | - | 3,025 | 1.088 |
| Winchester 120-grain Positive Expanding Point (X25062) | 120 | 0.363 | - | 2,990 | - |
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.