Using that OAL you don't even need to pull the bullets you made with 5.4gr since Hodgdon lists an OAL of 1.200". I also feel you don't need to drop back to 4.7gr, starting at 5.0gr will be fine. Even though magnum primers will burn slightly longer and slightly hotter than standard primers they don't create a nuclear explosion.Ok, so we're looking at in the neighborhood of 1.268 COAL. I've decided to scale it back to 4.7. Sound ok?