Unless I missed it, he never said that he was trying to shoot 500+.

​​​​​​I've never owned a 7mm mag although I've had a few to play with that were borrowed. I've owned several .300win mags. For a basic hunting rifle, which is what the first post stated, I don't see any real world advantage in switching.
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Of course, if you're just itching to buy something I'd say go for it. The senderos are nice rifles.

-Jake