That's still available from Remington, you probably have to register on line and request an obsolete manual. http://www.remington.com/library/downloads/owners_manuals.asp
what is a Remington 760 300 savage worth it is a gamemaster
Go to Remington's website. There you can download a copy of the owner's manual. (did that for my 870)
I think your Remington Model 760 (there were other models also called Gamemaster, but not in 30-06) has a magazine capacity of 4 cartridges.
Remington Model 760 Gamemaster.
100-450 USD
Depending on exact model and condition, your Remington Mdl 760 Gamemaster is worth about $400. More or less.
100-435 USD or so
$300
You can request one for free from Remington at http://www.remington.com/library/downloads/owners_manuals.asp
You can tell the year by looking at the Manufactured Date information on the Remington Society of America - see related links.
The 30-06 appears to have been one of the few calibers in this model that made it thru the complete life cycle of the 760 Gamemaster, which was fron 1952 to 1980.
No, they do not. I called the company directly and they recommended a grind to fit model.