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Technical Knowledge about Star and Degree Crimper.

Both these crimpers gives you the best result. Degree and Star Crimper on reloading, , especially star crimped area of hulls,works together to makes the controlled depth . We advise you to use both these crimpers together in reloading shotshell .
Crimp the hull 4-5 mm depth with star crimper and then use degree crimpers for best conical shapes of shotshell. This will give you best conical shape without any defect. After this process you will find best crimping dimensions and height for your powder and shot grains.  There will no gap center of crimping and there will no spiral damages.
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