Most all the Hornet shooters I know feel Lil' Gun is THE optimum powder for it, but all guns are individual, so YMMV.
Snuffy's method of neck sizing works with tapered cases like the Hornet and the .30-30. Only cases with small side wall angles get into trouble with the headspace being squeezed longer by contact with the sides of the sizing die before the neck is adequately sized. Ackley Improved cases, for example. So give Snuffy's method a try.
If you want to absolutely maximum case life, try the
. It works the brass less, because no expander is needed. Because it has no expander, it also doesn't have any real tendency to pull necks off-axis. For $5 more you can get it in a set with Lee's dead length seater, if you want to give that a try, too?
When the case gets tight enough from repeated firing, you'll have to full length resize it or at least push the shoulder back a little. You can get a separate Redding body die for that which leaves the neck alone. Some benchresters find bumping the shoulder back one thousandth each time gives them better accuracy than leaving the case completely fireformed. I can't see a difference as long as I orient the case headstamp the same way for each firing, so I'm in the habit of loading neck-sized cases with the headstamp upright so I don't have to remember which way it goes?
I know of one fellow who has gotten 156 reloads from one of his cases. Keep annealing the necks every fourth loading or so, and don't push the pressures to maximum, and you can make neck-sized cases last a long time. 50 reloads is not uncommon among benchrest shooters. It's one reason they can justify all the time they spend prepping brass.