I didnt adjust for reciprocity at all on the first one, and I kinda just guessed at reciprocity adjustment on the second shot I did outside.
I noticed that you adjusted for reciprocity by adding about two stops overexposure. Is that a rule of thumb kind of thing or is there an actual equation for adjusting for reciprocity? I've read the data sheet for hp5+ and found the recirpocity chart, but I dont think it covers exposures longer than 75 seconds. I dont have it printed out, but I'll look it up again and make sure about that