To my eyes, you have a scatter group at 73.2g. The reason I say that is that you have 2 bullets that group with the 73g load and 1 that groups with the 73.4g load. Therefore, the OCW should be 1.5% above and below the scatter group. That would make your OCW charge at 72.1g and 74.3g. I dont see that covered in your test.
I would reshoot around 72 and see if you get consistent POI.
