Sounds like you may hae an issue with the seating stem not having sufficiently deep inlet to handle the pointy bullet. You might take it out of the die and examine how the bullet fits the stem. The seat stem should capture the bullet somewhere on the ogive of the bullet, not put pressure on the tip of the bullet during seating. The bullets will have varying lengths because of irregularities in the tip. This variable is omitted when the seating datum is on the ogive and the "jump" to the lands is consistent aiding in better repeatability.
Gun control is hitting what you aim at..