I hear you bro! I used the spine calc for some CE Heritages and can't get bullet holes with them despite tuning the arrow or bow. Always nock high at 5 yards and nock low at 10 yards. The calc worked spot on for my Gold Tips and they required no special tuning, bullet holes. So, I gave up the paper and just went with where they were hitting. The CEs were going where I was looking with field points and I felt really good about the Heritages but once I put a broadhead on it, that changed . So no more CE for me. Gold Tips fly the same, field point or broadhead. Sticking with those.
So, skip the paper and shoot with field tips first then broadheads and if they hit the same, where you look, then there you go.