I have targets and a Hornady concentricity gauge that tells me time and again that Lee dies work, they work quite well.
If you're loading for one turnbolt rifle and your die set doesn't include a collett neck sizing die, I highly recommend getting one.
It not only extends case life and eliminates the need of case lube, it also gives you brass fire formed to your specific chamber.
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GOA
USA Shooting Supporter
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