Definitely something to check. I don't use the Hornady tool any more...actually sold mine. I prefer a fired and properly sized case with a slit cut in the neck. Start a bullet in the neck by hand, rub a little oil on the ogive area of the bullet and chamber. Extract the dummy round carefully and measure.

The oil will help keep the bullet from sticking in the rifling. If you need more tension at the neck, just give a squeeze. I've had great results with this method and the results are VERY repeatable.