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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.
Winchester stopped the regular production of 20 gauge in 1963 and the 20 gauge magnum shell wasn't introduced for several years later.
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 300 Win Mag wasn't introduced until 1963. It could have had a new barrel put on it. Take it to a gunsmith.
The 22wmr stands for Winchester magnum rimfire.
The winchester model 670,and magnum models were made from 1967-1973.
No. Only what is stamped on the barrel.
The very first .357 Magnum cartridge was introduced in 1934 by Smith and Wesson.
There was no 300 Winchester Magnum cartridge in 1939. A 1939 Model 70 would be marked "300 Mag"...and it will be chambered for the 300 H&H Magnum cartridge. There was no other 30 Magnum cartridge in 1939 in the Model 70. The 300 Winchester magnum cartridge was introduced in 1963,...the last year the Pre'64 Model 70 was made. Your 1939 Model 70 may have had a later barrel swapped in to it. 300 Winchester and 300 Win Mag are the same cartridge.
WMR stands for Winchester Magnum Rimfire- and is the proper name for the 22 Magnum. They are the same cartridge. The 22 WRF is the Winchester rimfire, and is a shorter, less powerful version of the 22 magnum.
Rifle chambered in one of the cartridges named Winchester Magnum- such as the .300 Winchester Magnum- or .300 Win mag for short.