DES,
I neck size the brass for my Hornet with no problems.
I am new to the Hornet, so I have only loaded mine
a few times. I just started using the Lee Factory
Crimp Die. It seemed to make a difference with
my Hornet. Groups are under 1" at 100 with
Sierra 45gr Hornet Varminter bullets and 12 grains
Lil' Gun powder.
Robert