Re: mil or moa
To be exact, 1 MOA is 1/60 of one degree. There are 360 degrees in a circle, so 1 MOA is exactly 1/21600 of a circle. At 100 yards though, it comes out roughly that 1 MOA = 1.05", so 1/4 an MOA is roughly 0.26". Here's the exact math though:
100 yards = 300 feet = 3,600...