Best leupold yey - Leupold VX-6 3-18x50mm Side Focus CDS Rifle Scope

I paired the VX-6 with a recently purchased Remington 700 XCR in 300WSM. This is my second Leupold Fire Dot scope. I am shooting sub-inch groups at 200 yards, thanks to the added magnification and the precision offered by the fire dot. I anticipate ordering my CDS as soon as I finalize my bullet and load details for longer ranges. My only issue is that I seem to lose light capturing capacity in the higher magnifications and low light situations, but when I back down to 10x, I have no issues. Probably something to do with physics. I shouldn't be too troubled though, I am talking about the last minutes of a late hunt. I had no issues taking a deer at last light at 260 yards. One shot kill.