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Old August 7, 2012, 12:14 AM   #2
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Join Date: November 12, 2000
Location: Colorado Springs, Colorado
Posts: 9,494
I do not have specific XTP data, but Lymans 48 has two similar loads with PP. The first is a 230gr FMJ with Min/Max as 6.4/7.2 grains, and a 225gr JHP with Min/Max at 6.5/7.3 gr of PP.

I'd start at 6.4 gr of PP and seat it to where it will fit in a Mag and see if it looks normal, perhaps seat it slightly deeper until it Looked right. That should give you a safe place to start developing a load with them.
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