I "partial resize". use a full length die,,run about half the neck into size down area. Some of the body is sized a bit. I've since used several Collet neck size dies,,but have not had a "handi" rifle since.
I now am back into owning a Handi,,a .357 mag. Although I have carbide dies,,I may try sizing only the area that holds the bullet just for testing.
I neck size only for some of my bolt action rifles,,,but have not tried a neck only in a Handi except for a 30/30 Ackley Improved. I used a .308 Winchester Full Length die to size the necks only with the 30/30 AI empties. Worked fine even tho the neck walls of the 30/30 case are a bit thinner.
Alan in GA.