Power is a requirement in IPSC competition, along with speed and accuracy. The power of a given cartridge is measured by both bullet weight and velocity. The weight of the bullet fired in grains (7,000 to the pound) is multiplied by the velocity (feet per second) and the total must exceed certain thresholds. A competitor's ammunition is fired, in the competitor's firearm (velocities can vary slightly from one firearm to another) to measure the velocity for scoring. A Major load is one that exceeds the threshold of 160,000 or 170,000 (depending on the division competed in). To shoot Minor, a competitor's ammunition must exceed 125,000. Extra scoring is not given for exceeding the threshold. A competitor declaring Major, but who fails the threshold, has his/her score re-calculated at Minor. A shooter who declares Minor, but fails that threshold, is given a score of zero for the match.