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Old July 16, 2012, 04:34 PM   #18
Senior Member
Join Date: December 1, 2002
Posts: 2,832
"...that much difference..."

I give up, how much difference is 'that much"?

Changing a primer, bullet or powder lot in an established load will make a difference, the question is how much and which way. Any change is likely to require reworking the load; swapping primers willy-nilly and comparing the results of an established load isn't much of a load testing proceedure.
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