300 win.
No, the 300 ultra mag cartidge is not interchangeable with the 300 win mag.
200-1000 US dollars.
Depends on who made the 300 Winchester Magnum.
Depending on condtion it can range from 150-500 USD.
$500.00 80% or better
.300 WM is larger in calibre, it has a longer case, and it generates more energy.
Rifle chambered in one of the cartridges named Winchester Magnum- such as the .300 Winchester Magnum- or .300 Win mag for short.
For an answer on that question, your best bet would probably be to contact the customer service centre at O.F. Mossberg & Sons, Inc. See related link to go to the contact page of the company's website.
Too much
400 USD or so
A Sears Model 300 Winchester Mag rifle could actually be worth several thousand dollars. A rifle in very good condition can sell for up $3,500.