Yes that works like a charm I have done that many times and I have not had to turn the necks, if I had to turn the necks I would not do it and find something else I am to lazy to turn necks.When I do things like this I anneal the brass first, remove stem from 243 sizing die run 260 brass thru die trim to length then reinstall stem and resize and load. In some instances you may need to turn the necks but not always.