I tried a ladder at 300 yrds and it was worthless. 500 is really the ticket. I just need to find a place near where I moved to shoot 500.

If your limited on distance I would really try the ocw method.

At 200 yrds grouping issues mess up the test. Unless you can shoot it 3-5 times and come up with the same nodes.

But yes seating test would be next in two nodes and find which one comes out on top