Rough rule of thumb- 30-06 and longer= long action. .308 and shorter= short action.
Short
Long action. .308 and shorter- short action. 30-06 and longer, long action.
Long
Long action
Short
Long action.
Short
Short.
the 220 swift is considered a long action.
Long or short refers to the length of the cartridge the action will handle. .308 (parent case of the .243) is a short action.
Ruger American Rifle short action calibers (.243 Win, .308 Win, 7mm .08 Rem, 22-250)
Short. Compare cartridge overall length to a .308 Winchester. That is a short action. Longer than that is a long action.