Just thought I'd post an easy way to do a ladder test for load development. I used to hate setting up a camera(or shooting partner) out by the 500 or 1000 yard target. Now I set up a phone scope with my spotting scope behind me to watch the shots at 400 yards on a plate. Works great for the rough first step in ladder testing and then you can go to shooting three shot groups at longer distances, usually 500 yards to verify the nodes. Works great for me but there's always other ways. Here is a video of a 7-08ai I built and tested.
