Stupid question for the day. I am reloading for a Remington Sendero 300win mag. I am having a problem where periodically the bullet will pull out when I go to eject a live round from the gun. I have played with the crimping. I have brought the die down to the point where it distorts the case enough where it wont chamber. I back the die off just to the point where it does not distort the case. Even with this the bullets will still on occasion pull out. New Remington brass, berger 185 vld hunting bullets. Seating: I put a bullet in an empty case and ran it into the lands - measures 3.655 OAL The best groups came with a 3.611 OAL What am I missing???