FoC | Isolated Front-of-Center Effect
Predicted change at +5 percentage points of front-of-center, in inches at 70 yards, with total arrow weight and the other build details held equal. Bars are 95% confidence intervals; lower (left of zero) is better. Solid dots are results we're confident about; hollow dots are ones where the bar still crosses zero (the data can't tell).
FoC | Isolated Dynamic-Spine Effect
Predicted change for two stiffer-dynamic-spine moves: a static-spine step of +100 nominal spine units stiffer (e.g. a 300 shaft to a 200) and a 50-grain drop in total point weight. Front-of-center is already in the regression, so each row isolates the component on its own. Bars are 95% confidence intervals; lower (left of zero) is better. Solid dots are results we're confident about; hollow dots are ones where the bar still crosses zero (the data can't tell).
- Stiffer static spine
- Less total point weight
FoC | Front-of-Center Effect on Drift, Whole-build View
Predicted change at +5 percentage points of front-of-center, in inches at 70 yards, without holding total arrow weight or launch speed equal. This is the "whole-build" view, where higher-FoC arrows were also a little heavier and slower. Bars are 95% confidence intervals; lower (left of zero) is better. Solid dots are results we're confident about; hollow dots are ones where the bar still crosses zero (the data can't tell).