Yes
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
No. Two entirely different cartridges.
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.
The 7mm Remington Mag.cartridge is a long action cartridge.Its overall length is longer than 2.800in. Also a standard 7mm is long.
The caliber of ammunition the rifle uses is usually roll-stamped on the right side of the barrel, just in front of the receiver. For example: if it says "7mm Remington (Rem.) magnum (mag.) you would need to buy that type of ammunition as sold by Remington, Federal or any of the other companies offering this type of ammo in whichever bullet weight you prefer to shoot.
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!!!!
30/06 is one
100-1000 USD depending on where you buy and what condition it is in.
@ 2800 fps or so
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 value of a Harrington and Richardson 7mm Remington mag serial number 52897 depends on its condition. This gun in excellent condition is valued between 125.00 and 200.00 as of 2014.