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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.
Jimro
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