Yes
1960
100-400
100-1000 usd
Doubtful. The .308 Norma Mag was a fairly short lived cartridge, and competed with Weatherby's own line of magnum rifle calibers.
Find a gunsmith and ask for help.
Norma makes ammunition, not rifles. Accuracy will depend on WHICH rifle is firing the .308 Norma Magnum cartridge. Many are Schultz and Larsen products, others are hand built conversions. Accuracy will depend on whether it is a target rifle or a lighter sporter grade rifle. The round has pretty much been bypassed by the .300 Winchester Magnum cartridge.
Get it to a gunsmith now.
50-1000 USD depending on specifics
If you don't have an owner's manual, go to a gunsmith and ask for help.
Either 1-10 or 1-12
50-300 usd