Often called “MOA,” minute of angle is a term used to describe the measured distance between the point of aim and where a shot has or would impact a target. Specifically, a minute of angle is 1/60th of a degree in a circle, but for shooters, it is defined as 1 inch at 100 yards (it is actually 1.047 inches, but that is generally too small a difference to matter in most cases). Shooters use this method to adjust their optic or point of aim based on the distance to the target, and it is easiest to measure this distance using an optic with a reticle measured in MOA. For example, if a shot is low at 100 yards, the shooter measures the distance between the point of aim and the bullet’s impact point and adjusts their optic or aim in inches or fractions of an inch. That adjustment distance expands as the target distance increases and reduces as the target gets closer. So, 1 MOA at 100 yards is one inch, but at 200 yards, 1 MOA is two inches. Conversely, 1 MOA at 50 yards is .5 inches. Most MOA scopes can be adjusted in .25 MOA increments. It can also describe the accuracy of a firearm. If a firearm shoots “Sub-MOA,” that means it can create a shot grouping of less than 1” at 100 yards. Generally speaking, precision rifles are the only firearms to perform around or under MOA.