You will pay for it, but that die conforms to your chamber perfectly. One, a custom die honed for your exact chamber can be made by several different custom shops, even the large manufacturers have custom shops that do this work. Two things can be done here if someone wants precise case sizing. If the necks are so grossly out that turning would be of benefit, do you really want to use that case in a precision load, even if they are turned? In that instance, my suggestion would be to get better brass for precision work. Turning the cases can witness mixed results, due to the fact that local hardness variances within the material many times will create a turned neck with larger variances than what was experienced prior to turning, at least with common neck turning tools. I've witnessed shoulder bumped cases that won't chamber because the side walls are bulged out of spec, and neck sizing continues to allow the case to change creating chambering issues as well, and it occurs without any respect to case concentricity. Having an innate knowledge of machining capabilities and how tolerance stacks affect systems, I do not believe some of these methods are best for the average hand loader. The body sometimes going untouched, or shoulder bumped only. A lot of effort in the last decade or more has been focused on sizing the neck with bushings from the OD and potentially neck turning for concentricity. Nothing novel here many have said this before, including bench rest shooters. Let me start off by saying that the best resizing die will be that of a full-length sizer, backed out to bump the shoulder roughly. It still needs to be steel, however, as wielding a 2 lb sledge around a bunch of cast aluminum never is a good idea. The ram is stroked during this process, so torsional strength isn't relevant, but easy access is, hence the desire for the C frame. For hydraulically forming operations, which I mention later on in the die section, I use a strong cast C frame press. Having said all that, there are plenty of good solid single stage presses for the tough case sizing work. It so happens with its novel way the dies insert into the press, it's actually very fast in change out as well. The Coax is known for its consistency as it relates to minimizing runout. Other designs rely on perfect machining of multiple pieces to hopefully get that same level of precision. My favorite is Forster's Coax press because it allows just enough freedom for the case to find its own axial alignment with the die. My personal preference revolves around precision, not speed, so for me, that's a fully supported, single stage press. The caveat here is that I've never been a long or short range target competitor, so the guidance you will see here is in relation to hunting loads predominantly, but a lot can cross over. I think these next few tips are for the experienced and novice hand loader alike. Some have been successful, others not so much. In my search for ever increasing precision, I've experimented through the years with certain things. There's plenty of objective reasoning, but there is also a boat load of subjectivity and opinion baked into the following, along with a bunch of free plugs for the companies that make the things I like, so read on with that in mind. This section will probably just grow as I think of more things to add. This is a hodgepodge of tips, tricks, and things I've learned or really liked over the years in no particular order and with no particular rhyme or reason.
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