It's actually Winchester's fault they released the 264 magnum in around 1956 then did the 300 and 338 on the same case therefore Remington using the same case for a 7mm in 1960(?) called it the magnum.
It's actually Winchester's fault they released the 264 magnum in around 1956 then did the 300 and 338 on the same case therefore Remington using the same case for a 7mm in 1960(?) called it the magnum.
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