7mm STW ballistic coefficient chart
G1 and G7 ballistic coefficients for 13 7mm STW factory loads from 140 to 162 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| A2 140-grain Nosler Ballistic Tip | 140 | 0.540 | - | 3,450 | 1.255 |
| Remington 140-grain Pointed Soft Point Core-Lokt (R7MSTW1) | 140 | 0.391 | - | 3,325 | - |
| Remington 140-grain Swift A-Frame PSP (RS7MSTWA) | 140 | 0.332 | - | 3,325 | - |
| Winchester 140-grain Ballistic Silvertip (SBST7STW) | 140 | 0.464 | - | 3,300 | 1.255 |
| Speer 145-grain Grand Slam (24566) | 145 | 0.327 | - | 3,250 | 1.110 |
| Federal 150-grain Trophy Bonded Bear Claw (P7STWT1) | 150 | 0.413 | - | 3,250 | - |
| Winchester 150-grain Power-Point (X7STW1) | 150 | 0.341 | - | 3,280 | - |
| A2 160-grain Nosler Partition | 160 | 0.565 | - | 3,250 | 1.270 |
| A2 160-grain Sierra Boat Tail | 160 | 0.622 | - | 3,250 | - |
| Federal 160-grain Sierra GameKing BTSP (P7STWA) | 160 | 0.566 | - | 3,200 | 1.258 |
| Federal 160gr. Trophy Bonded Tip (P7STWTT1) | 160 | 0.520 | - | 3,100 | - |
| Winchester 160-grain Fail Safe (S7STWX) | 160 | 0.336 | - | 3,050 | - |
| Hornady 162gr. ELD-X Precision Hunter (80851) | 162 | 0.631 | 0.318 | 3,050 | 1.478 |
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.