Originally Posted by m102404
Personally...I'd rather use a chrony vs fiddling with mics and timing sound charts. It may not be as accurate...but it's quick, repeatable and easy.
I agree, and I have one on order - it should be delivered today (I hope; apologies for omitting this comment). My calcs are rough, I know, but they indicate that my measurements can't be that far off if the original calibration in the rifle was 430+ fps with a 0.2 g round (conservation of energy, after all).
Anyway, will re-chrono the rifle tonight to recheck velocities, and may have a weekend project learning about gearboxes. :wink: