Good lightweight hunting scope with turrets

[Boltgun]

Nightforce NSX 2.5-10x42 is 20oz. Fits your stated goals perfectly

This.

 

[gclubb02]

Swfa 3-9 would fit the bill, looks about like a duplex reticle on 3 power which should serve you well on a close, quick shot as well as handling all the other tasks you are looking for it to do