Now it's time to confirm that load and see if its repeatable.
Too complicated. Just shoot a single 3 shot group and you are good to go.
What I find incredible is that you would assume that is what I did without even knowing me. I have shot the load 4 times with consitent results which is why I can state I found my load. By the way I have been churning out handloads for over 40 years so I know a thing or 2 about testing loads.