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They both shoot the same diameter bullet(.308),However a 30-06 has a larger case capacity(The amount of powder it can hold)which means when loaded up to its specs,can push heavier and faster than a .308win.A 30-06 is about the fastest .30 caliper cartridge that you can get without steping up to a Belted Magnum Round.The 308win/7.62x51 Nato is the result of simply pushing back the shoulders of a 30-06sprg case and trimming.That cartridge was desighned during the time the U.S. Military was trying to phase out the 30-06,because then soldiers could carry more ammunition with less weight.However by doing so they did loose on accuracy past the 500 yard mark because of its slower velocity.The original Springfield model of 1903 chambered in 30-06(Formerly known as the 30-03)was accurate out to 640yards pushing a 180gr bullet,far beyond what the .308 win can do even with a 148gr bullet...

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13y ago

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