You have a good objective but what you need to know is the length limit that will fit in your magazine, this is usually the limiting factor. Seat at that length then back up till you fine the most accurate seating depth. Contrary to popular opinion when doing this you need to be aware that as you decrease the available volume in the case you increase pressure. It's not touching the rifiling that causes a big pressure increase but maintaing the same powder charge while decreasing case volume. When doing this you need to measure from the cartridge base to the front ogive of the bullet for accurate ammo as bullets out of the same box vary in dimensions.
Last edited by jeffppc; 10-14-2019 at 11:11 AM.
Reason: Additional information