Reloading the Hornet, K-Hornet, and their wildcats .......

[skeet]

You really did answer your question. But the fact is You are resizing the thinnest part of the case so you'll still get the neck splits. If using in the same gun all the time I have found that just depriming and cleaning if necessary, and then reloading the case is just fine for my Ruger 77-22 Hornet. I mean decapping with out resizing. I can get 6 or more loads out of each case without splitting. So far anyway. I bought 100 new cases(Winchester) and haven't lost many of them yet. And that little gun shoots. Oh and Billy is right li'lgun is a great powder for the hornet

Edited to add
Oh and I use a Lee factory crimp die. Seems to help but just a little crimp...and keep case length consistent from case to case. They seem to stretch a bit.