What size do you want? what would you use it for? may consider a scope with multiple aiming points..../crosshairs.

I think they only load 150 and 180 factory, but I know some guys love the 165gr if you handload....I'd probably stick to the 180 or 165 if I handloaded.....when I think any 300 magnum I think 180gr, nothing less, if flatter shooting was your goal I'd probably have a different round, the 180's are plenty flat and have some other good qualities going for them as well.