For a strictly coyote rifle, I'd opt for a sporter-weight barrel, especially if shots are going to be <300 yards. It'll be a lot easier to carry around, and will allow you to more easily move the rifle if the 'yote comes in from an unexpected direction. Heavy barreled rifles are USUALLY more accurate, but because of the weight and bulk are best suited for static shooting scenarios where you have time to bag it in or set up on a bipod (like prairie dogging).

Also, Minute-of-Angle is a unit of angular measurement. There are 360 degrees (°) in a circle, 60 minutes-of-angle (') per degree, and 60 seconds-of-angle (") per minute. You most often see this form of measurement used for coordinate systems on a sphere (Longitude and Latitude). For instance, the Statue of Liberty sits at 40°41'21.23" North Latitude X 74°02'39.93" West Longitude. The Minute-of-Angle measurement is useful because it is very close to 1" per 100 yards (one MOA @ 100 yards is 1.047197580733"), and can be easily used to describe absolute accuracy without the need to include the range, and to predict group size at any range. So it your rifle shoots 1 MOA that will be a 1" group at 100, 2" @ 200 yards, 3" @ 300 yards, etc... If I said that I shot a 1" group, without stating the range, the information would be useless because I could have shot the group at 25 yards (4 MOA, which is barely adequate, IMO, for a 100 yard deer rifle), or at 400 yards (1/4 MOA, which is outstanding accuracy). But if I say my rifle shoots 1/2 MOA, it doesn't matter how far I was from the target, you still know that it's a very accurate rifle.

Mike