8x68S ballistic coefficient chart
G1 and G7 ballistic coefficients for 10 8x68S factory loads from 127 to 224 grains, with the manufacturer's muzzle velocity and, where published, bullet length.
| Load | Weight (gr) | G1 BC | G7 BC | Velocity (fps) | Length (in) |
|---|---|---|---|---|---|
| Sax 126.5gr KJG-SR (M0028) | 127 | 0.297 | - | 3,676 | - |
| RWS 139gr. EVO Green (2318547) | 139 | 0.327 | - | 3,343 | - |
| Norma 180gr. TIPSTRIKE (20180412) | 180 | 0.361 | - | 2,985 | - |
| RWS 180.5gr DK (212 35 17) | 181 | 0.282 | - | 3,100 | 1.110 |
| RWS 180.5gr KS (211 81 49) | 181 | 0.311 | - | 3,248 | 1.102 |
| RWS 186.7gr HMK (211 81 14) | 187 | 0.326 | - | 3,182 | 1.180 |
| Blaser 196gr. CDP | 196 | 0.344 | - | 2,985 | - |
| Norma 200gr. Swift A-Frame (20180372) | 200 | 0.357 | - | 2,953 | 1.235 |
| RWS 200gr. EVO (231 65 22) | 200 | 0.350 | - | 3,002 | 1.240 |
| RWS 224gr. KS (211 81 22) | 224 | 0.343 | - | 2,854 | 1.260 |
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.