I'd say that pepper grinders are one of the inexpensive kitchen tools that most often fail to deliver (can openers are another.) An awful lot of pepper grinders are just not very good at grinding pepper, I'm afraid. I'd recommend the one I have, because it worked pretty well when I first got it, but after four years it is starting to not work so well and I'm in the market for another one. I'm thinking I might try this: https://www.amazon.com/dp/B0006GSR76/. It's pretty well reviewed. I don't have personal experience with it though, so caveat emptor.