I would say that I have a fairly strong grip. But when I pull 170 kg I feel the bar starting to slip (double overhand, no straps, no hook grip) right before lockout, so I missed the full lockout, because my strength gave in (the bar was not dropping, I was still able to set it down).
With mixed grip I pulled 3x165 kg the next day which is a greater achievement considering the predicted 1RM of 175kg.
The numbers don't matter here and are just a mere example. My question is: Can my body output more power/strength when my grip is stronger, let's say so strong that I don't even feel holding something?
Is there a study about that topic?