Bushing dies do not quite reach the shoulder, but if this is unfired brass, it shouldn't be a problem, just get an expander mandrel and die from the same company that makes your neck turner and lube and expand the case neck prior to turning. If you are talking about factory chambers and fired brass, you really should run the case through a one piece die, set to touch the shoulder, and then use the expander mandrel and turner. Those are your options, it is really pretty straightforward. One of the problems that I sometimes run into is that fellows that are new to this try to get creative, and do it their way, not fully understanding what they were stepping into. What ever you do, don't do it to all of your cases until you are very sure that you have the whole process fully in hand, and that the results are perfect. From time to time I read where some fellow did something to a whole batch of cases and is looking to fix a problem that would not have happened if he took more time and worked with a few cases. When I adjust my neck turners, I use "range brass", that was discarded by some shooter that does not reload, after I have the adjustment spot on, I switch to my new brass, with the confidence that it will be turned to the thickness that I had in mind. I use a caliber that is one size smaller than I will be turning so that I don't have to size the case for the expander to work. For example, if I am adjusting for turning a 6mm case, I will expand up a .22 caliber fired case, after first cleaning the inside of the neck a little.