Yup - lead sled. typically do not use one for sight in/dope development but for load development I find that its can be a much faster way to find a load with less rounds simply be removing the human from the math.
I believe you answered your own question here. You don't need to 'remove the human' you need to improve the human's ability to hold the rifle consistently and to not anticipate recoil. Your lead sled is a crutch.