How to tell if a crimping bulge is too much.

chief16

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I just started reloading, and when I was trying to crimp the case I noticed it had bulged at the neck. It is 7mm rem mag, i measured it to 5 thousands bigger than at .315". The others i loaded were .310" I don't want the gun to blow up in my face!Experienced loaders please help!
 
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