title_body: Different grinding size for boil coffee and coffee maker?
upvoted_answer: Yes.  For a drip coffee maker, most people will want to use a medium grind that balances getting enough extraction and still allowing the water to flow through the coffee grounds.  For immersion (boiled) coffee, you generally want a course grind that will slow extraction somewhat (reduce the chance of over extraction) and make the grounds less likely to end up in the final product.