Between $3,000 and $4,000, depending on condition. The Mdl 70 .458 was only made in Supergrade, which has a value about double that of a standard model 70.

They can range from 1,600 to 2,000 depending on the shape. I've seen them as much as 2,200 for NIB condition.

I will start my answer with a question?Are you sure that your winchester model 70 was made by winchester in 1948?I ask this because the 300 win.magnum was not a chambering that was available until the late 1950,s.The cartridge was based on a 458 winchester magnum case that was necked down.The 458 winchester came into being in 1956-1958.It also spawned the 264 win.mag caliber,and the .338 win mag caliber.I would expect that your winchester model 70 rifle was rechambered at some point in time if it is indeed a winchester model 70 made in 1948.This can also be said if we are talking about the .300 weatherby mag chambering.

The 22wmr stands for Winchester magnum rimfire.

The winchester model 670,and magnum models were made from 1967-1973.