According to the SM5 loft/grind chart, the 60.04L has the lowest bounce of all 60 degree SM5s. I assume this is when the club is played square.  But which 60 degree grind has the lowest effective bounce once the face is wide open for a flop shot?  Is it still the L or does the S, M, J or K play with lower effective bounce in that open position? 

Thank you for any info you can provide.