John Barsness recommends anywhere between 47-50 gr of H4350 as a MAX load.
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You cannot beat 47.0 to 50.0 grains of H-4350 and any bullet around 140 grains in Remington’s little update of the classic 7x57mm Mauser. Some bullets are longer and grabbier so will only take the lighter charge, but Hornady’s 139 grainer will take 50.0 grains. Muzzle velocity ranges between 2,800 and 2,900 fps in 22- inch barrels.
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HANDLOADS THAT WORK PDF
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