Not sure how big your cotton fields are there in Tipton Co., but here they are typically no more than a few hundred yards across. A lower power scope like survivalshop suggested would most likely serve you better on a patrol rifle.
The PD where our range is located used to be run by a chief who said rifles were "an excessive display of force" or some crap. One of my instructors was their armorer at the time. He quietly stocked away all the rifles that the department seized. Early one morning, there was a shootout in a cotton field. Suspect had a .30-06, officers had duty pistols. One officer still connected with a shot at about 110 yards.
Know your weapon system and practice, practice, practice.