I just bought a 77-.257 Roberts that has a 77-247** number. I call them and they said they only go back to:
77-50834 and that was 1982...any idea's ??
Thanks, Tina ((tilzina)

sorry, that number from Ruger is 1983

Tina, if you don't get any help here you might want to check www.rugerforum.com and see if they can be of assistance.

This from Rugers customer service page.


M77 - Original Tang Safety Model Rifle
(Manufactured from 1968 to 1984)
Calibers: 22-250 Rem, 223, 220 Swift, 6mm Rem, 65mm, 243, 257, 25-06 Rem, 250/3000, 264 Win, 270 Win, 280, 284 Win, 7x57, 7mm Rem., 7mm-08 Rem, 30-06 Sprg, 300 Win Mag, 308 Win, 338 Win, 350 Rem, 35 Whelan, 358 Win Mag, 416 Taylor, 458 Win Mag, 458 Rem Mag
Beginning Serial Number: Years of Production:
1 1968
1912 1969
70-14532 1970
70-23555 1971
70-45045 1972
70-67406 1973
70-87509 1974
71-28501 1975
71-75101 1976
72-38101 1977
73-05351 1978
73-92701 1979
74-65901 1980
75-42703 1981
75-97690 1982
77-50834 1983
77-68636 1984
The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your Ruger firearm was shipped.
Ruger does not necessarily produce firearms in serial number order. There are occasions when blocks of serial numbers have been manufactured out of sequence, sometimes years later. Also, within a model family the same serial number prefix may be used to produce a variety of different models, all in the same block of serial numbers. And in some cases, firearms may be stored for a length of time before they are shipped.
For details on your specific serial number you may contact our Service Department: 336-949-5200