Hodgdon didn't admit that H414 and W760 were the same powder until a very few years ago. Prior to that, like everybody else, they listed pressures/velocities that differed slightly due to different manufacturing lots. Which is why they eventually "dropped" W760 a couple years ago--by ceasing to put W760 labels on canisters of the same powder.
Plus, the Accurate 2700 data was shot at the Western Powders pressure lab in Montana, not by Hodgdon. And no doubt was a different manufacturing lot of powder.
