You're asking a lot for a 16" barrel to go out to 500 yards. I have 3 accurate loads with a 7/08 at 16" 120 sst 44 grains of 2208, Speer 130's 41 grains of 2206h, Speer 145 48 grains of 2209. I really cant see these being used beyond 300 yards. I'm going to try 120 Barnes next but as Beaver says a hot load behind a Berger may do the trick.
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