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Old July 28, 2013, 10:04 PM   #14
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Join Date: July 5, 2007
Location: Pacific NW
Posts: 1,310
If all you do is a light chamfer (to remove burrs from trimming, which nobody does...), there shouldn't be a "knife edge" at the mouth.

And, if you only remove the bell using a taper crimp die, there shouldn't be a roll crimp even if there is a chamfer.

What you might see is a very thin gap...
.30-06 Springfield: 100 yrs + and still going strong
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