I'm using a comparator to check the seating length on my .223 Remi with Berger 55gr match bullets.

If I extend the bullet so that it is above the overall length and push the bullet and comparator case into the chamber so that the rifling pushes the bullet into the case the measurement is 2.911".

If I have the bullet seated well into the case, chamber it and use the comparator rod to push the bullet so that it touches the rifling the measurement is 2.850".

So a difference of 0.061".

This makes a considerable difference when I'm looking at how far off the rifling to set the bullet.

Which way do you use to check the seating depth, push the bullet back into the case or push it forward?