Is the old Ruger an action where there is a spacer to make it more efficient for feeding short cartridges like the 308? Just thinking about reboring the 308 to 358 and set it up for long loaded 350 Rem Mags. Guess I need to go back and look again. Be Well, RZ.
No, Ruger offered two action lengths in the original M77 rifles- 308 and 30-06 length,
The only "blocking" done on the mags were with rounds like the 22-250 in the short actions. There was a .5" sheet metal spacer block in the rear of the mag. I always cut it out on my personal 22-250 and 220 Swift m77s.
The .308 should be good to go.
