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Old January 22, 2013, 01:01 AM   #4
Junior Member
Join Date: February 28, 2012
Posts: 9
According to Alliant's website, 6.7 grains is the MAX charge, so a good starting point would be 10% of that (~6 grains). For cast bullets, you'd want to start a bit lower than 6 grains.

I load 180gr. cast at around 5.8 grains of Unique. Works great in my PX4.
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