Since it is in .308 caliber, it's the newer of the two "F" ("Featherweight") models with the .22-inch barrel.
The "99-F" Model was made from 1955 to 1973 and was the first Model 99 with a model designation on the outside of the rifle. Look on the rear, right-hand side of the barrel.
I hope the Model 99 you get was made BEFORE 1960... and the serial number is UNDER 1,000,000 with no letters in front of the serial number because the older models made before Savage moved from Chicopee Falls, Mass. to Westfield, Mass. in 1960 are considered to have the best workmanship and demand a higher price in the market than the Model 99s made in Westfield.
My Model 99 is a 1953 "EG" model... and generally averages .75 inch or less 3-shot groups at 100 yards. I've shot 3-shot groups measuring as little as .112 inches at 50 yards. Model 99s are reknown for their fine accuracy which rivals that of the more accurate bolt-action rifles.
Handloading for the Model 99 in .308 Winchester is easy... and the loading information is readily available. However, with lever-action, pump-action and semi-automatic rifles, one should FULL LENGTH RESIZE the cartridge case rather than neck-size it in order to get consistent, dependable cartridge feed and chambering.
To learn all you can about the Model 99s, write for Doug Murray's book, "The Ninety-Nine". It is "THE" treasure-trove of information about the Savage Model 99. It has two pages dedicated to your Model 99-F, Section 3, pages 62 & 63.
Doug passed away a year or so ago, but his widow is still taking orders and mailing out Doug's books. I believe the cost is about $29... and is well worth the price for any Model 99 owner.
Here is the contact information:
Mrs. Doug Murray
20 Polo Lane
Westbury, N.Y. 11590
Strength & Honor...
Ron T.