waaaaay to many variables and some of those are listed above to include quality of gear boys.
I mean how long did you last the first time you banged you a damn near or perfect 10 ? Age, status/number of notches of 8 , 9 and even 7 s on your belt, did you do a pre emptive discharge or was it a spontaneous stroke of good fortune, were you buzzed and was she ?
The potential variance for pounds gained or strokes/min accumulated are to many to calculate with any reasonable amount of certainty .
( On test d bol..starting at 188 a hard 188 I got to a smooth but cock strong 203..or 15 pounds...and kept 7-8 )