42.0 of IMR 4064 pushing a 175 Match King is an "Index Load" -- if your rifle doesn't shoot it well there's something's wrong with your hardware. 44 grains of Varget will push most bullets accurately in a bolt rifle. Stick around 42 to 43 for autoloaders. Dan Newburys ocw recipes: .308 Winchester using IMR 4895. More @Wikipedia
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