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Old 04-02-2007, 20:11   #31
MakeMineA10mm
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Join Date: Feb 1999
Location: Central Illinois
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Years ago, I decided to mess with HS-6 in the 10. After a lot of study, I decided that HS-6 SHOULD have the perfect burning rate for the 10mm.

Then, I searched through all the loading manuals and found that NONE of them gave as heavy a load or velocity, as what I thought they should give, considering how HS-6 compared to other similar powders. I tried a few test loads and found some similar stuff to you.

Bottom line is that HS-6 will give about 80% of the performance of other powders, and does not live up to anticipated expectations considering its location in the burning rate chart. It's just one of those quirky situations where it doesn't work out...

HS-7 on the other hand...
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