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Old February 16, 2001, 01:04 PM   #9
ZeusOne
Senior Member
 
Join Date: January 6, 2000
Location: The hills of Western MD
Posts: 237
Your assumptions are correct. A proper crimp holds the bullet a little longer, allowing the pressure to build up a little more before the bullet starts it's journey. Various test data I have seen also indicates that ignition is more consistent from one round to the next, which contributes to better grouping.

Collect a few different factory rounds (or borrow from friends) and inspect the crimps with an eye lupe. They'll all be a little different, but seeing for yourself is worth a thousand words.

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