"Better" is a subjective term. Without more information, neither is "better"
The cartridge known as the 7mm-08 was derived from the .308 Win (7.62x51mm). The casing mouth is necked down from the original 7.62mm (.308") to 7mm (roughly .280").
No.
that would depend on which 7mm cartridge you are referring too. ie 7mm-08, 7mm Rem mag, etc
The 08 is referencing the parent case, the .308, necked down to accept at .284 diameter bullet versus the .308 caliber. Other variations of the .308 case: .243 Win, .260 win
A Remington Model 700 chambered for the 7mm 08 cartridge would be a short action as the cartridge is based on the .308 Win.
.308, and its derivative cartridges (like .243 and 7mm-08) and generally short actions. 30-06 at its derivatives (like 270, 25-06) are long actions.
Ruger American Rifle short action calibers (.243 Win, .308 Win, 7mm .08 Rem, 22-250)
Yes. I have a Savage Model 110 7mm-08. I don't think they make it in this model anymore, but they do make 7mm-08 in other models.
No, 7mm-08 ammo is not interchangeable with 7mm Mag rifle. Although they have similar bullet diameters, the cartridges have different dimensions, pressure levels, and velocities. It is crucial to use the correct ammunition specified by the firearm manufacturer for safety and optimal performance.
long action: 270, 30-06, 7mm rem mag. Short action: 243, 308, 7-08, 7mm wsm.
NO!!
The 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case length. Of cartridges based upon the .308, it is the third most popular, behind only the .308 itself and the .243 Winchester.[1] In 1980, the Remington Arms company popularized the cartridge by applying its own name and offering it as a chambering for their model 788 and model 700 rifles.