A flat nose seater can help. However with thin jacketed, soft cored plated bullets, it'll create flat nosed FMJs. How consistent those flat points are formed depends on how consistent the force needed to seat the bullets happens to be.

I suggest buying a number of seating stems, greasing a bullet and then placing a small amount (seriously, a *small* amount) of JB weld in the seating stem, seating the greased bullet and letting it cure for about 8 hours before raising the arm on the press. The end result will be the top of the seating stem conforming to the curve at the end of the bullet.