I have done a ton of PSA to SGC Crossovers - here are the results of my last batch but its been about the same for all of them (around 500 or so cards)-
17% Got a positive bump (6 out of 35)
49% Crossed even (17 out of 35 cards)
20% Got a downward bump (7 out of 35)
14% Did not cross (5 out of 35)
34% got a negative result (either dropped a grade or DNC)
Good luck!
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