I just shot this OCW test this morning. It is for a 280 Remington, using Nosler brass, 4831sc, and 162 Blem, I assume Amax. I am pretty sure I shot the second shot of 51.8 at the wrong target. Then the third got away from me, while thinking about what happened on the second shot, and after checking that the rings and base had no wiggle.
You can see the POI start to move up from 51.3 to 52.3. Then it moves right and stays consistent from 52.8 to either 53.3 or 53.8, depending on what happened with the one shot on the 53.8 target that ended up off the edge.
The one I am not sure about on the 53.8 charge has muddied the water. What do you guys think? Is there a node from 52.8 to 54.3? Is there a node from 52.8 to 53.3 and a different one from 53.8 to 54.3, followed by a scatter node and obvious POI change at 54.8?
I would run seating depth test at 54g, based on looking at my brass, and seeing no pressure. Usually I would run seating depth tests with the rest of these fifty pieces of brass that are no loaded. I would then chronograph to get and average velocity and an idea of ES and SD. Where would some of you go from here?