To crimp or not to crimp?

I bought 2,000 bullets that had shot well in my ar 223 and custom 22-250. The new batch was different and 2 1/2 inch groups was th e best they would do. I tried a light crimp with a Lee crimp die, the groups dropped to 1 1/2 inches with no other change. I have learned never say never.
 
Originally Posted By: Michael Sears...a light crimp with a Lee crimp die, the groups dropped to 1 1/2 inches with no other change. I have learned never say never.
.. +1 ..
 
Never crimped any of my bolt actions.

Only thing I'm doing crimps on now is my Garand, and that's fairly typical for AR/semiauto platforms, and even that comes down to preference.
 
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