I personally wouldn't use anything less than a 180 bullet in a 300 RUM. Different powder/bullet combinations will generate different pressures. Check a few reloading sources to find good starting points. It would be best to get a manual from the bullet maker and/or powder maker or give them a call. I am running 180 E-Tips out of my 300 RUM with 97.5 gr of Retumbo. With a 180 bullet I would recommend starting at about 90 gr but your best bet is to contact the bullet maker and then the powder manufacturer.
Nightforce has great tracking capabilities, they are rugged, a bunch of elevation, holds zero forever, and reticles are designed for long range shooting. So if you are looking to shoot long distances constantly, then you need a scope that can take the abuse. -- gilmillan1
Nightforce is such a solid combo of reticle, available elevation, glass that is good enough to shoot at the longest range you can dial. Nightforce has bullet proof construction that can handle the incidental horse rolling or some other rodeo action. -- bigngreen
The total package. Nightforce is the best I have used as far as turret feel and solid detents. I have never had one that didn't track right on and always return to zero. Nightforce NXS is the best value for everything I need. -- Broz