I just finished making a batch of .22 HP from 30-30 brass. This project turned out to be much easier than I had figured on.
I started out with new Remington brass. The first step was to neck size to .284 right to the start of the shoulder, then I neck sized to .257 staying about .090 away from the shoulder, and then full length sizing with the HP dies. The last step is to trim the cases by about .030
The neck wall thickness is .012-.013 witch is the same as an original HP case. Out of 50 cases I only lost 3 and that was due to using too much case lube.
