Decided to run 15 shots per target, started with a cold barrel. 100 yards, 80 degrees, 60% humidity, 5mph cross wind from right. Cold barrel on left, hot on the right. Cheap Federal American Eagle 55 grain ammo and 8 inch targets. This is from my custom built AR that I put together for accuracy. 3-9x40 scope, used my range bag to rest front hand on. No bench rest!