When would you say a springer is balanced? Is it when you've just added enough weight to the stock to cancel upwards recoil...i.e the rifle moves only backwards? Or should there be no movement at all?? Correct me if I'm wrong...tks
balance = SoG on the trigger. more weigh = reduced recoil. combining the above by adding weigh to the front or rear of the rifle will get you close to balanced. the more weight you add the less recoil you will have. And adding weight in the middle like a heavy scope will not improve stability even though the rifle might be heavier or more balanced. you need to add weight at the extremities to get the most out of the weight.
The trick is consistency in everything you do including posture, triggering and holding/supporting points and forces applied. Otherwise the energy AndrianV mentions will lead to different barrelmovement eachtime.
Tuning is another thing and weight balancing also something else.
All in all, shooting is a mind and self-control game, especialy with the springers that like challenging you.