Multi submissions to PSA of same card... thoughts....

I have a few stacks of some modern rookies (Griffey & Glavine) and wanted to submit them while they are approaching their milestones. Has anyone had any experience submitting approximately 25 to 50 of the exact same card or would it be better to mix in 5 at a time with other cards just to break it up. My thought is that if I really cherry pick the best that I have accumulated, maybe half could be 10's on any given day. But will the grader get into 9-mode seeing the same card over and over and only grade a couple of the cards a 10?
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NathanSr
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I've had good luck submitting 10-25 of a given card before. Seems they'll always find a coupe to put 8's on and they'll find at least one 7 or 6. The rest will be graded accurately.
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