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how to test when changing powder lots

 
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Old 10-16-2013, 08:57 AM
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Join Date: May 2013
Posts: 132
how to test when changing powder lots

How or what to do to test for accuracy when changing powder lots. I'm loading for a 270 win with H4350 powder and don't have a lot of data on velocities with different powder charges. I'm done some searches and cant' find the answer to this question.

Do I start over and test from min to max powder charge in .5 grain increments? Or do I find the powder charge just starting to show pressure signs and then back off 2 grains? Or do I vary powder to get the same velocity of the most accurate load in the previous lot?

Thanks.
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Old 10-16-2013, 09:45 AM
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Join Date: Aug 2003
Location: NC, oceanfront
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Re: how to test when changing powder lots

I'd back off a couple grains & increment back up into restored grouping. -No other changes-
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  #3  
Old 10-20-2013, 04:41 PM
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Join Date: Jan 2010
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Re: how to test when changing powder lots

Quote:
Originally Posted by Mikecr View Post
I'd back off a couple grains & increment back up into restored grouping. -No other changes-
+1 on this
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