The max hit is a term used to describe the highest amount of damage that can be inflicted in a single hitsplat by the player. The higher your strength level is, the higher your maximum hit will be. You can test your max hit on a player with no extra defence bonuses, such as a duel with another player. It helps if the other player has no defence bonuses (no items equipped) and a low defence level which will increase your chances of seeing your max hit.