I agree with Matthew, I do believe the best part of the accuracy of the Sport is the 5R rifling, I also believe that the Melonite coating is a contributing factor because of the fact that there seems to be an issue with the chome lining being consistent all the way down the barrel. After my last shooting episode I proved to myself that trigger control is a very important part of accuracy. If you cannot pull the trigger without pulling the rifle off of the target you cannot shoot accurately. I have had a tremendous amount of training but sometimes I really have to go back to the basics to get consistent accurate groups. It is also easier when Pdog hunting than when shooting at a target.
Matthew you will be blown away with tuned ammo!

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Grover Oathkeeper