1971- New model 99 added: Model 99A-a re-introduction of the saddle gun Model 1899A featuring plain straight-trip buttstock and forearm with old-style schnoble tip.
1977- New Model 99 added in straight stock brush-gun version along with the re-introduction of the .358 Winchester cartridge in the Savage Model 99 line.
1980- New .375 Winchester Big Bore cartridge added to the Model 99 Brush-gun. Only offered one year in this model. This Model 99 in .358 & .375 discontinued at the end of the year.
1981- The .375 Winchester chambering is added to the Model 99A Saddle Gun.
1982- The Model 99A Saddle Gun is discountinued at year's end. It is the last of the straight-gripped Model 99s.
I hope this helps you out.

Strength & Honor...
Ron T.