Take the seater stem out of the die. Good to rough up the inside of the stem's shape fitted nose to give the epoxy a rougher surface to bite into. Degrease the stem.
Good two part slow dry metal epoxy...something like J.B. Weld. Fast dry epoxy isn't nearly asw strong and usually drys kind of fexible....the slow dry metal epoxy (the stuff with two tubes, one of black goop and one of white goop) dries hard.
Mix the expxy (following the directions on the stuff).
Grease the nose of your selected bullet...can use a thick coat of wax, but greasing it with a thin coat of wheel bearing grease seems to work just as well.
Put a little expoxy in the seater's nose...set the seater on the nose. HAS TO BE SET STRAIGHT...slow dry gives you more fiddle-around time, but once you get it dead straight prop it up until the expoxy starts to set (about 2-4 hours).
Once it starts to set, it's still possible to adjust the alignement slightly..get it right and then re-prop it.
After about 6 hours, the epoxy is NOT cured...but it's easier to break the bullet loose, trim off the excess epoxy from the sides of the stem with a razor blade, re-grease the bullet nose, and set it up straight again.
Over night cure...twist the bullet loose from it's grip...file the excess expoxy flush with the outside diameter of the seater.
Will last a good long while if made with good epoxy, but it ain't forever.