" For the answer to that one, you'll still have to ask us.
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Only the Ruger Records Department can properly identify rifles in the "78-" action series (and they can only verify the configuration in which they left the factory). Had yours been a standard serial number series, it would indicate VERY early 1985.
The above chart shows the approximate first serial number shipped for the indicated year.
Had yours been a standard serial number series, it would indicate VERY early 1985.
Your serial number falls roughly into the 1982-1983 date range, but it is impossible to definitively date these rifles.
(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 The above chart shows the approximate first serial number shipped for the indicated year.
HOWEVER, the "78-" series of actions were produced in massive numbers in 1978, as a hybrid of the two action designs, with an adjustable trigger only seen on that action series (serial numbers starting with "78-").