Over 3000 yds
Depending on the rifle, 1000 meters +.
You will have to contact Weatherby to find out.
Yes, you can shoot a .300 Weatherby cartridge in a .300 Weatherby Magnum rifle, as they are the same caliber. The .300 Weatherby Magnum is designed specifically for that cartridge. However, ensure that the rifle is in good condition and properly maintained for safe shooting. Always follow safety guidelines and consult the rifle's manual if in doubt.
You will have to specify whether you want to know point blank range, maximum range or maximum effective range.
Nice rifle
You will have to contact the Weatherby Collector's Association.
2800m
@ 3,500
1.5 miles. Not the effective range, but total range.
Depends on the rifle firing the cartridge. The maximum effective range is around 500 yards. The maximum range (with no accuracy) is about 2.5 miles
100-500 or so
@800