I'd not fret putting one on a .300 Ultra. But then I may have read more than one thread on one site...........
My 6x held zero and tracked fine for the last couple hundred rounds on an AR .223, so it's not been torture tested. I did have an issue with an Aero mount, went to Burris rings and have not had a problem since.
I suppose I could throw it on a bunch of rocks a few times like Stick, but I've elected not to.
It is about to get mounted on a Pard's 6 Creed, I suspect it will hold up.
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