I had one.... accurate rifle it was...Ruger customer service can tell you the date it was manufactured by its serial... in fact their web site use to have a place you could just type in the serial and it would give you the manufacturing year...and caliber it left the factory in...

Mine had TWO mishaps with factory ammo...wrecking the stock each time and requiring repair to the action...no fault of the rifle tho...Black Hills ammo was the problem...

after the second time, I ended up giving mine to Mike Bellm when he lived here in town, and he was a friend...he desired to make it into a 222...

The barrel had 8,000+ rounds down it, and it was still a very accurate shooter...