Short action
It would be considered a "short" action.
long action magnum
The caliber designation of 7mm-08 is considered a short action.
If you are refering to the 6.8 sps cartridge then that cartridge is a short action cartridge.
The Remington 700sps in 270 wsm is a short action .
Short
If its a .308 its a short action.
The start of long action cartridges is the 30-06. The 7mm Mag is longer than 30-06, so would it be considered long action.
The Remington Model 742 in .280 caliber is considered a long action. This is because the .280 Remington cartridge is longer than cartridges typically associated with short action rifles. Long action rifles are designed to accommodate the overall length of longer cartridges, making the Model 742 in .280 compatible with that classification.
short
Long action. The .270 cartridge was based on the 30-06, a long action. .308 length is short action.
30-06 and longer cartridges are long action. .308 is short action.