Hello all! I am sure this question comes up often but I was hoping to get some input on a upcoming opportunity I have. I have the opportunity to purchase either a Winchester model 70 in 416 remington, and looks almost brand new. The other option is a Ruger (not sure the model) in 416 rigby, looks to have more wear than the Winchester but still in great condition. I don't have a lot of experience with either cartridge, but have been shooting a 458 win mag for several years. I will primarily be reloading ammunition for rifle that I chose. With this what would you recommend?

The two cartridges are nearly ballistically identical. The very large Rigby cartridge was developed to prevent overpressure by the extremely heat sensitive cordite in hot environments. The oversized cartridge called for oversized actions. The Remington is the more user friendly of the two. Depending on year of manufacture, the Winchester 70 in 416 may be one of the smoothest cycling large rifle actions out there. Modern, temperature insensitive powders like Varget help prevent overpressure issues in cartridges like the 416 Remington.