It varies on blade grind, steel, hardness, etc. For example, I tried a 6000 grit mirror edge on the S90V Para2 at 40 degrees and it did not perform the way I expected. It would slip though some material rather than actually slice it. At work we received 5 new high capacity copy machines and they came wrapped in a stretchy, clear plastic wrapping. The simple act of slicing the surface caused the blade to slide on the surface. Now, I had heard about this material before and had never really expeienced trying to cut it with a high polished edge. However, once the plastic was punctured and the knife would push cut through it like nothing was even there. I gave the bevel a once over with the 600 stone and the steel really came alive. It would slice just about anything with ease. On my S30V beater Military, I noticed that at a fine edge (3000 grit) it performed perfectly, then I just tried the 1000 grit stone and it was even better for my own uses. Not very scientific, no controlled laboratory environment, no scales to measure pressure, just real world scenarios.
