Basically the case is all. Same caliber bullet, but the case is shorter in the ultra mag. Its basically just a smaller round, bigger punch.
The 7mm Ultra Mag is a Remington cartridge. THE model 70 is a Winchester rifle. Winchester does not chamber the Model 70 For the 7mm Rem. Ultra Mag cartridge.
no!!!!!!!
Depends which 7mm your talking about. The only 7mm I know of that has a larger case capacity than the 300 wby mag is the 7mm Remington ultra mag or 7mm rum
Personally I think the 7mm ultra mag is the best choice of weapon. It really depends on what you are doing with it. The 7mm ultra mag has very little drop and is an excellent long range weapon.
Size and amount of propellant
It should be marked on the barrel. There are other 7mm rounds besides the 7mm Mag.
Biggest physical difference is case size and lack of belt on the RUM
30/06 is one
One is longer, one is shorter.
DO NOT DO THIS!!!! The OAL on the 7mm Mag is 2.5 inches and the 7mm Weatherby is 2.55 inches. SInce they headspace on the belt, and due to the freebore in the Weatherby, the 7mm Mag may chamber in the Weatherby. SAAMI lists the 7mm Mag/7mm Weatherby as an unsafe combination one will probably chamber in the other. DO NOT SHOOT UNLESS YOU ARE SURE YOU HAVE THE RIGHT AMMUNITION!!!!
The 7mm mag has mare pressure that a 270 win.
Out to 1000m or so