My pleasure, I've got a full detailed article about it, but it uses human targets as the standard way to do it and hight velocity 5.56 and 7.62mm rounds
Its not getting the range wrong, its getting the size of the bunny wrong, this as you correctly say can lead to a miscalculation in range and as you say may cause a wounding rather than a clean kill or more likely a clean overshoot of the bunny, alerting them to your presence and making em scarper while giving you the scutt
Phantom