To answer this question, first determine how many darts your blaster can hold. Basic models typically fit less than 10, while higher-end options accommodate up to 50. If your blaster has a limited capacity, you may only need 24 bullets. But if you have a high-capacity blaster you may need as many as 1,000. One thing is sure: you won't want to run out of ammo in the middle of a battle so make sure you have plenty!