I have Lee Factory Crimp Dies for all six calibers, the only time I use a crimp is when I can't get a load to shot good, less than MOA. For the most part I don't use them. The best part about handloading, is you get to go shooting and when you find a load that works there is a good deal of satisfaction. Work up two identical loads one without a crimp one with a crimp. You'll probally come to the same conclusion as most everybody else, no crimp necessary on a bolt gun. So if you buy the crimp die and doesn't work out you're only out 12 bucks and you will have the piece of mind knowing it is not necessary in most cases.
Tom
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