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Hornady 7mm 139gr GMX??

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Unread 05-07-2010, 08:27 PM
Junior Member
Join Date: Dec 2007
Location: Somewhere twixed Waterloo & Cedar Rapids, IA
Posts: 20
Hornady 7mm 139gr GMX??

Has anyone tried these? Their website states compatible with
conventional load data. Really? The bearing surface on these is
looooong! In my 7mm WSM, there would be more bearing
surface inside the case than in the neck! It appears the bearing
surface is around .640, and I'm wondering if my 9 1/2 twist
barrel will even stabilize them.

For anyone who has tried them, do you get better accuracy with
the bearing surface close to the lands, or loaded like a
regular 139 Hornady at the book specs?
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