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Old November 2, 2012, 12:32 PM   #3
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Join Date: October 18, 2006
Posts: 6,148
GMM has been loaded with IMR4064 and Reloader15. The current Navy version of M118LR (Mk316 developed for SOCOM) uses a 41.75 gr charge of IMR4064 with a Fed GMM primer, 175 SMK. Standard M118LR brass.

The 4064 charge is supposedly more temp stable than the Re15 load, according to NSWC Crane.

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