It is a long action that has limiting spacers included. The magazine has a spacer at the rear and the bolt has a different bolt stop that prevents the bolt from moving to the full long action length. So I have been told.
Short
Browning only lists two action lengths for the BLR, standard and long. The 257 Roberts is in the standard action. It can legitimately be used in a short or long action depending on the bullet used and the maker of the rifle.
Short.
It depends on the particular model of the rifle, not the caliber it is in. What model and make is it?
Short action
long
long
30-06 and longer cartridges are long action. .308 is short action.
Your winchester model 70 chambered in .308 Win.is a short action.
your win mod. 70 was made in 1953,that being the case there are the short action calibres which are rounds with a loaded length of 2.800 in.or less and the long action which are for calibres with a loaded length of 3.340 in. in length.the short action calibres were .22 hornet,.243 winchester,.257 roberts,308 winchester,300 savage,.the long action calibres were .220 swift,270 win.30-06 springfield,300H&H..375H&H etc. hope this helps.
Yes, the length of the action.