I use both Hornady and Lee dies, when seating I do it in steps first I sit the projectile in the case and raise the ram till the projectile makes contact with the inside of the die and then give it a couple gentle taps (not enough to seat just enough to level the projectile, then I wil start to seat maybe 1/6th of the way, drop the ram back down and turn the case about 1/4 turn then repeat the process until fully seated. This will help with run out and help to seat your bullets straight.
I do this with both Lee and Hornady dies as I learnt this way and its just habit even though its probably not necessary with the Hornady dies it certainly won't hurt.
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