I took my Remmington 375 RUM topped with my Vortex scope on a January Bison hunt in SD with Willie Dvorak of Jim River Guide Service. I was blessed with harvesting a trophy Bison Bull. The Vortex scope is extremely clear, gathers good light and stands up the the tremendous pounding of a 375 Remmington Ultra Magnum. Great scope and company, I highly recommend. There was nothing about the optic that I did not love.I give it 5 stars out of 5.