The Collaborative International Dictionary of English v.0.48:

Upshot \Up"shot`\, n. [Up + shot, equivalent to scot share,
   reckoning. Cf. the phrase to cast up an account.]
   Final issue; conclusion; the sum and substance; the end; the
   result; the consummation.
   [1913 Webster]

         I can not pursue with any safety this sport to the
         upshot.                                  --Shak.
   [1913 Webster]

         We account it frailty that threescore years and ten
         make the upshot of man's pleasurable existence. --De
                                                  Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

upshot
    n 1: a phenomenon that follows and is caused by some previous
         phenomenon; "the magnetic effect was greater when the rod
         was lengthwise"; "his decision had depressing consequences
         for business"; "he acted very wise after the event" [syn:
         consequence, effect, outcome, result, event,
         issue, upshot]