IMHO, there's absolutely nothing wrong with the Leupold 1.5 X 5 scope you already have. If you feel you need something with a bit more magnification, I'd go with the Leupold 2.5 X 8. On my .375s, I use the Leupold 1.75 X 6, and have shot game in excess of 200 yards with it. Funny thing is, I've never had it set at more than 4 X, except when at the shooting range.