Have seen good service and collected game using a variety of scopes. As Mart says, it's generally long hours of daylight during hunting season, low light performance is great but it doesn't need to be the absolute best and illumination is not necessary IMO.
I've used and been happy with Leupold 2.5s, both regular and scout, fixed 3xs from Leupold and Weaver, Leupold 4x, 1.5-5, 2-7, 3-9, 4.5-14, a Weaver T10, Burris 4.5-14, and a 1.75x and 2-7 from Redfield.
The Mrs has and uses a fixed 1x steel tube Weaver on her 22, a Leupold 1-4 on her 270, and a new Redfield 2-7 on her 30/06. She hasn't had a lick of trouble connecting on game with any of them.
