I recently got me a new rifle, it's a Kimber 84M as well as a Leupold VX-1 4-12x40mm. I don't like the 50 MM because you'll need taller bases. If you have a Bass Pro shop nearby go down there and compare them side-by-side. When I hunt I always keep my variables at four power. But if these animals are far enough away you have time to increase the power.