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Can I interchange .300 Win Mag/.300 Wby Mag/.300 Ultra Mag ammunition?

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We do not recommend, under any circumstance, interchanging .300 Win Mag, .300 Wby Mag, .300 Short Action Ultra Mag, or .300 Ultra Mag ammunition. These cartridges are not interchangeable. Doing so can cause serious malfunctions and/or personal injury.

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