Notice the shape of the 6mm 105 grain Target Hybrid bullet in Figure 1. It’s long nose and boat tail make it a better match to the G7 standard. As expected, the G7 BC of this bullet is much more constant over the velocity span (3000 fps to 1500 fps) than the G1 BC. Over this speed range, the G1 BC migrates/varies by 0.011, whereas the G1 BC migrates by 0.087!
Check out Table 1 below to see what that means in terms of trajectory prediction error. Using any of the valid G1 BC’s for this bullet, you can calculate anywhere from -296” to -266” of drop at 1000 yards. That’s a window of 30” (very bad accuracy)! However, since this bullet is a better match to the G7 standard model, there is less variation in its G7 referenced BC, and the result is much less error in predicted drop. Going from the highest to the lowest G7 BC values for this bullet, the prediction window is only 6” at 1000 yards, which is 1/5 the error that’s possible with the G1 model.