In-line seating dies.......

[drcook]

I use the Redding Competition Seating dies. I am loading for different rifles, using different bullets and with the micrometer adjustment, it is just easier to reset bullet seating depth.

I use a 1" travel dial indicator on a magnetic base to put on top of the compression plugs to get that depth set (base goes on an empty spot on the Redding T7 plate, but a person could use a clamp on base) along with depth mics (probably a bit over the top).

By carefully measuring each component, I know what an overall cartridge length should be which allows you set the bullet exactly on top the wad with no deformation.