I think one can evaluate kamma vipaka in relation to:
-the characteristics of the doer; (AN3.99, sometimes numbered as AN3.100). If someone is small-minded, for example, even trifling immoral deeds can lead to hell. Not for someone who is big-hearted. Someone with much merit might not even notice the ripening of a trifling evil kamma, but the effect on a person with not much merit might be really painful. According to AN4.182 nobody can guarentee that evil kamma does not produce a future result.
-the characteristics of the deed; one can kill, for example, in many ways. One can torture someone to death. One can kill really cruel or even with compassion. One can feel that such is also relevant for the weight of kamma. It is also said (In AN1.314 and 1.315) that is does not matter what the kamma is, if the view that instigates that kamma is wrong, the results will be wrong. We discussed this earlier. I belief these AN sutta’s tell that one cannot only look at the quality of intention for determining the results. It is a combination of view and intention which seem to determine results.
-the characteristics of the receiving party: immoral behaviour to own parents or holy persons weigh heavier. This is also true for moral deeds.
Just to get this clear for myself. If something is wrong i hope you correct.
Siebe