If I read this correctly, Mark rechambered it.

Originally Posted by safariman
I have re chambered a 300 Win MAg to a 300 WBY and did that one myself with a borrowed reamer, lots of cutting oil and a "T" handle. It shot great before and after with Orignal Barnes X 180's, Moly'ed. I just did a 7mm RemMAg custom MAuser from 7mm RemMAg to 7mm Mashburn Super and it is a really good shooter but I never shot it before as a 7mm Remington Magnum. I was afraid that if I took it and shot it as a commone SEVEN EM EM MAGGIE I would lose my rilfe looney card and or die form boredom at the shooting bench smile

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