C120
IMO it is best to adjust the FL resizing die to just set the shoulder back a couple of thousands of an inch for best chamber fit and function in a bolt or single shot hunting rifle. When FL sizing you are restoring the case to SAMMI specs.; Sizing the neck enough to hold the bullet and not working the case after each fireing. Sometimes a certain amount of improved accuracy can be had with neck sizing; but don't beleive it will be very much. In my rifles the partial sizing has worked well and the case is not worked as much as full lengh sizing. Hope this helps.
CK