Does your shellholder contact the base of the die? If it contacts the base of the die and presses a little to insure that the round is fully processed, you win. There is enough play in the shell holders that you are simply indexing the flat base of the case against the flat surface of the shellholder, and if that case and shell holder meet, isn't that al that matters? that the thing reaches full distance into the die? There is no problem with a little bit of looseness or with a little bit of misalignment as you work unless you are working for benchrest thousand yard accuracy. To a large extent, the average shooter puts far too much concern into the level of precision that they have built into their equipment and loads. If a procedural change can add up to a few hundredths of an inch, and you manage to scrape out another MOA of accuracy by spending an extra thousand dollars, counting powder by grains, weighing, etc, how does this explain the many people who get MOA groups with factory stock rifles and ammo? If you can get MOA or so with your lee, what can you expect to gain by switching to an RCBS?
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