4seventy
Take a look at the Leupold 1.75x6. It gathers more light than the 1.5x5. My wife has one on her 308, I have the 1.5x5 on my 375. Both have the heavy duplex which we really like.
In Africa I used a Swarovski 1.5-6x42 PV-1 with the illuminated circle dot reticle, on my 9,3x74R double. I really like this scope, but it might be a little larger than you want. The other scope that I have fitted to this rifle is a Leupold 2.5-8, with heavy duplex. It works well too.