A 30mm tube doesn't do much for me. A plain jane 3-9x40 with a 1" tube and duplex reticle is what I prefer for hunting. Most of my shots are under 100 yards on called in predators so 9 power is plenty. My scope normally sits on 4x and I rarely touch it. Brand is up to you. Leupold, Burris, Nikon, Sightron, Vortex, etc... they all make good scopes. I see no need to spend more than $400 to scope a calling rifle.