Hi Bob, I have a delta wolf and let me begin by expressing how frustrating it was for the first few weeks... as trial and error takes so much time and pellets. Mine is a 25 cal and so far the jsb 25.39 gr. is what i mainly shoot. Every pellet or slug will require its own tune...
Currently my settings are as follows
25.39 gr. JSB
2680
76 volts
138 bar reg.
Im still tuning this but its a great place to start