Thread: 10mm and clays
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Old December 4, 2019, 09:59 PM   #6
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Join Date: January 6, 2006
Location: Valley of the Sun
Posts: 10
Clays works great in 45ACP, 38, and even in 9mm...............if there is no data, there is a reason for that.
Pressure/velocity testing is a time-consuming and expensive process for loading manual makers. None can test all appropriate powders, so choices are made limiting those tested. And since Clays is listed for the .44 Magnum (and others) by its distributor it should be appropriate for the big 10.

Lyman does list one pressure-tested load with Clays in the 10mm, under the Sierra 190 HP. So it must be appropriate. Maybe not the best...

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