you should be able to loop heaven 5-6 times consecutively before the clock is considered stable. even if you run games smoothly, it doesn't mean the OC is stable and you will see significant degradation in the chip over time.
my 7850 was stable for 1.5 years at 1200mhz, then it started crashing, and now is only stable at 1160. i'm sure in another 9-12 months it will only be stable at 1100mhz, so on and so forth. that's the risk we take with the OC, but having the chip stable helps the longevity some. and anything over 1250mhz on the 7850 is pushing the envelope, so be aware that within 6 months you may find similar degradation or worse. just food for thought.
otherwise the scores look fine. i score 7800 with the 1160 OC on my 7850, however my 2500k is @ 4.3 which helps the score too.