Since it has been buried a little, here are the target sizes and COF from the article.
You can debate what the original timing equipment and targets were. And you can debate what changes you’d like to make like 8” circles fully inside for convenience instead of 7”.
But if the Rangemaster May DOTY requires drawing a 5” circle on copy paper, I don’t think drawing a 7” circle is a big ask personally.
Just so we are on the same page for what drill we are actually talking about.