Depends on physiology. I have very big hands, and that makes gripping a bar really easy. To train grip I need to use Phat Gripz (this thing: http://amzn.to/2kG9XSf just look at the pic) when deadlifting for reps.

Some years back I was practicing martial arts. Certain disarms just didn't work on me simply because of how far around the weapon my fingers went.